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4L80E vs. Powerglide

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Old 03-05-2012, 11:41 AM
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Default 4L80E vs. Powerglide

First off, budget is a huge concern here. Looks like I tore up the TH350 I had built last year for the car.

Car is a fox body coupe, LQ9, B/W S475 turbo, has gone 5.85 @ 118mph off the footbrake through a TH350. Car is street legal, has a/c, radio, etc., but is really only driven to/from the track, and around the house for data logs, grab some dinner, etc. This is partly due to not having overdrive (think 2800rpm @ 60mph), and partly due to not wanting to tear up expensive tires, etc.

With that said I don't think I have enough money for a built 4L80 w/a trans brake, but want to see what the vote is.

The OD would be sweet and open up the possibilities of where I could drive it, but at the end of the day I'd still be chewing up expensive tires/brakes/etc plus increasing the likelihood that I get hit and get royally screwed by insurance.

On the flip side, the glide would probably be stronger, lighter, quicker, and less b.s for me to deal with (th350 and PG use the same x-member, would need to get a driveshaft either way but wouldn't have to wire in the powerglide like I would the 80).

So, glide vs. 4l80?

Also, how much can a 4l80 hold in stock form, and what how much are we looking at to build one up decently?
Old 03-05-2012, 12:00 PM
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Either would work in your combo, the Glide might have a gearing advantage. 2.48 low is a lot of gear for your combo, I would think a 2.10 ratio 4L80E would be a killer setup.

A glide for that power isn't going to be a cheap setup if done right. Aftermarket gearset, input, clutch hub, servo, valve body, pan, etc. Really should probably be in an aftermarket case too.

A Th400 would be the most economical choice IMO, but you're still looking @ a $1500+ build.
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Old 03-05-2012, 01:17 PM
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Originally Posted by Jake's Performance
Either would work in your combo, the Glide might have a gearing advantage. 2.48 low is a lot of gear for your combo, I would think a 2.10 ratio 4L80E would be a killer setup.

A glide for that power isn't going to be a cheap setup if done right. Aftermarket gearset, input, clutch hub, servo, valve body, pan, etc. Really should probably be in an aftermarket case too.

A Th400 would be the most economical choice IMO, but you're still looking @ a $1500+ build.
Would my current converter work in either the glide or the 400? Just had it built in December for this setup.

I don't know what gave out in the trans, I am assuming it has to be something mechanical as I drained the fluid out of it and it literally looked brand new, no metal, no pieces, smelled good, etc. The trans never slipped and I didn't know anything was wrong until I left the track. I think whatever happened to it happened on the last pass of the night, I pedaled it twice when it got loose (once out of the hole, once around 300ft, and I guess something let go. Terrible run (6.9@110mph, other guy had trouble too so we were both pedaling for a win)

It shifts 1-2 fine, but then when it goes for third (auto valve body) it clunks, sounds like hell, free revs, but eventually will go into third and drive. I drove it home (50+miles) this way without incident.
Old 03-05-2012, 01:20 PM
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Originally Posted by Jake's Performance
Either would work in your combo, the Glide might have a gearing advantage. 2.48 low is a lot of gear for your combo, I would think a 2.10 ratio 4L80E would be a killer setup.

A glide for that power isn't going to be a cheap setup if done right. Aftermarket gearset, input, clutch hub, servo, valve body, pan, etc. Really should probably be in an aftermarket case too.

A Th400 would be the most economical choice IMO, but you're still looking @ a $1500+ build.
Oh, and $1500 is about what I was hoping to spend. No way to get into a decent 80 w/a converter for that price. There is a nice glide I had a line on that was 1700, but looks like it's gone as well. You guys are the folks that build the bad *** 4l80's, right?
Old 03-05-2012, 02:22 PM
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Originally Posted by dville_gt
You guys are the folks that build the bad *** 4l80's, right?
That's us


We build killer TH400s 350s, and Glides. The 4L80E is where we've spent the most development time.
Old 03-05-2012, 02:42 PM
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Originally Posted by Jake's Performance
That's us


We build killer TH400s 350s, and Glides. The 4L80E is where we've spent the most development time.
Any input on the earlier post?
Old 03-05-2012, 03:19 PM
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Originally Posted by dville_gt
Would my current converter work in either the glide or the 400? Just had it built in December for this setup.

I don't know what gave out in the trans, I am assuming it has to be something mechanical as I drained the fluid out of it and it literally looked brand new, no metal, no pieces, smelled good, etc. The trans never slipped and I didn't know anything was wrong until I left the track. I think whatever happened to it happened on the last pass of the night, I pedaled it twice when it got loose (once out of the hole, once around 300ft, and I guess something let go. Terrible run (6.9@110mph, other guy had trouble too so we were both pedaling for a win)

It shifts 1-2 fine, but then when it goes for third (auto valve body) it clunks, sounds like hell, free revs, but eventually will go into third and drive. I drove it home (50+miles) this way without incident.
It would work on a TH400 and also a properly setup Glide, BUT the large ratio change of the Glide usually necessitates a different converter stall. So it may work but not be ideal.
Old 03-05-2012, 09:14 PM
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If you already have a Th350 then build a 400 its a killer trans.. if the car runs good with a 350 then the gearing can't be too far off! If i remember correctly the 350 is 2.57-1 for first.. I personally favor the 4L80E but the controller you would need would cost half the build of a 400.. stock 400 with a input shaft, 34element spag and a good soft parts kit would be good to 800hp... jakes performance is a great company from what i hear.. He may be willing to match ckperformace for a price on the intermediate shaft.. also you should upgrade to a 1.25 band.. after that your weak point would be the stock 4 pinion helical cut gear set.. Stay away from alto the steels they are too thin and warp over repeated cycles of severe duty.. You may want to consider a lock up torque converter! It will allow you to run a large stall for added 0-60 and 1/4 mile times and then lock it up for street and on the strip and will drop 200-300 RPM almost like a 4th gear....Most good torque converter companies will have a single disc lock up that will handle 900hp/torque for about 750.. A full 400 build t handle 750-800 hp.. $800-1000 with converter $1700 yank converters sister company should have the stuff you need to convert to lock up if desired.
Old 03-06-2012, 11:08 AM
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Put a glide in it.

With a turbo you really need the 1.80 or steeper first gear so the car can get off the line without spinning due to a high first gear ratio and/or end up on the back bumper also because of the high 1st gear ratio.

A glide's first gear allows you to throw a **** load more power off the line at it than you could a 4l60e, 4l80e, th350 or th400 all due to the first gear ratio.

All turbo radial tired drag cars have a Glide or a Turbo glide or a Th210 with steep first gear. That's why on the fast record setting passes the 60' doesn't even look fast because the front end stays down and glued to the track because of the first gear ratio(and a lot of other things, but it wouldn't be possible without that gear ratio).

Also since the ratio difference between the 1-2 shift on a glide isn't near as big as any other GM trans, it won't unsettle the car's suspension on the 1-2 shift lessening your chances of spinning.

Jake is also correct in saying that every reputable converter or trans builder will tell you when you go from a 3spd to a 2spd like a glide that the stall converter would work from the 3spd, but due to the first gear ratio change it will probably need more stall speed, and quite possibly a stator change.

All that being said, I would not even think about a TH400 or 80e. The 80e because of price, and the 400 due to the first gear and putting a 2.10 ratio in a th400 isn't a cheap option.

Also when you go from a 3spd. to a 2spd contrary to popular belief you will probably not lose any MPG.

The main diff. between a 60e, 80e vs. a th400, th350 and glide is the overdrive gear and the lock up feature.

Once you get rid of the OD gear, all you have is a 1:1 high gear which is the same in a th350, 400 and a glide.

The only difference will be taking off, and it would be kinda like taking off in 2nd gear of the 400 if you had a glide, but since most change the rear gear ratio slightly going from a 3spd to a 2spd you probably won't even notice the difference aside from at the track.
Old 03-06-2012, 01:41 PM
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FBODY.... You would switch to a glide if you could? And he said he drives it to and from the track and out to diner and such.. drive-ability would be greatly reduced with a powerglide due to the need for such a high stall converter.. Maybe i'm looking at it wrong but wouldn't a rear end gear change be better? most good shift kits allow you to hold any gear..
Old 03-06-2012, 05:28 PM
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I think the 2.10 gear 4L80E would be ideal in this combo, but at $1250 for the gearset alone it does add up.

A Glide with a Gear Vendors could be pretty neat as well, but again, the budget gets blown pretty quick.

Lots of options that would work well. We could do a 4L80E and make it a 2nd gear leaver, so it launches off the 1.48 ratio in 2nd to load the turbo.
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Old 03-06-2012, 06:50 PM
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Originally Posted by tommyboy86
FBODY.... You would switch to a glide if you could? And he said he drives it to and from the track and out to diner and such.. drive-ability would be greatly reduced with a powerglide due to the need for such a high stall converter.. Maybe i'm looking at it wrong but wouldn't a rear end gear change be better? most good shift kits allow you to hold any gear..
It would probably be a 500rpm difference. Never quite know for sure though.

I'd want something in the 3800-4200 range if it was a glide. He could do it with a TH400, but to get the same effective starting line ratio(1st gear x rear gear) the rear would be so low, the converter would have to be pretty loose and have an aggressive stator in it to get the shift extension needed to keep the engine in it's powerband and then you loose all efficiency.

The way I see it, it's not a DD right now, and it's already minus an OD gear and lock up so he's not going to be missing any of that "good" stuff lol.

I too agree with jake that the ultimate combo would be an 80e with a 2.10 first gear, but that is expensive, 1200 more than what it would cost to build one that would handle his power level right now with a stock bottom end and barely pushing that turbo he has. Same deal with the TH400.

The 2nd gear leaver idea for the 80e or the Th400 is a nice idea, but then again $$$.

For what he is trying to do a glide is the best option in my eye. It keeps his fox body light, it will actually lose 20 pounds or so over the TH350 he had in there with him finally having a transbrake he will improve upon his 1.33 60' he has already cut off the footbrake with the Th350.

It will take a different timing table and more boost, to make the glide shine out of the hole, but when that is done, I don't see why he won't be able to cut 1.2x 60's with it.
Old 03-06-2012, 07:35 PM
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I went 5.70's in my s10 with a glide behind a 406 with a 250 shot off the transbrake. It had a vasco input shaft, jw ultrabell, stock case, stock planetaries, billet forward hub and dual o ring servo. I had about 1500 in it minus converter. You can reuse your converter if you use a turbo splined input shaft. I built the trans myself.
Old 03-06-2012, 11:22 PM
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ended up grabbing a glide for it, lots of goodies and the price was right.
Old 03-16-2012, 11:07 PM
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Let me know how the glide works out for you! I alsom agree with Fbody. Its the best trans for what yur doing IMO
Old 04-12-2012, 10:58 AM
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Old 01-04-2013, 12:17 AM
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Originally Posted by Cam72aro
I went 5.70's in my s10 with a glide behind a 406 with a 250 shot off the transbrake. It had a vasco input shaft, jw ultrabell, stock case, stock planetaries, billet forward hub and dual o ring servo. I had about 1500 in it minus converter. You can reuse your converter if you use a turbo splined input shaft. I built the trans myself.
What rear gears and tire size did you use?
Old 01-10-2013, 09:33 PM
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Originally Posted by fastvet
What rear gears and tire size did you use?
Truck had 4.57 gears in a 9" with a 31x13.50 et drag tire on it.
Old 01-19-2013, 08:55 PM
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sorry not to jack the thread but im in the same boat sort of ive been debating making my stock 6spd car into an auto due to the recent changes in build. im going to be running an f1r in a 98 fbody forged internals in a 6.0 stock weight with 3.43 gears sees almost all street/cruise night miles some street racing. would a glide be better or an 80e? some other car guys suggested a glide. if i were to glide what converter would be best or is there a better option for the set up also budget is a concern as is with everyone in this economy



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