Sell it. Buy a glide and GV OD.. Problem forever solved

 

Extremely pricey.

 

Going fast isn't cheap. Going fast and being "reliable" is even more expensive. Roughly $8K will get you as close to bullet proof as possible at 1200whp and provide worry free WOT OD pulls. A top of the line jakes 80e is what 6k? and it still cant take WOT in every gear.. If you have the money and don't want to worry about it, Its the way to go.

BUT i understand most people don't just throw 8k around lightly.

 

I bet everyone who has went through multiple "cheaper" options are really gnashing their teeth for spending more than the pg/gv combo costs and they still have just another cheap option.

Blow up a Jake's 80e, and when you are looking for a replacement, you will really be wishing you had put your original Jake's 80e money towards a pg/gv combo in the first place.

There's a saying along the lines of it always being cheaper to build it right the first time, rather than building it multiple times.

 

Couldn't agree more. I've cheaped out and been burned on A LOT of **** in my day. When it came time to put all this power down the right way i nutted up and forked over the cash. Best decision ive made. 70mph @2450rpm on a 26" tire and 3:08 rear gear. Highway MONSTER

 

gear vendors works for Larry Larson.... it's just what, 5k-ish? On top of whatever trans you wanna build.

That'd be the way to go though(imo).

 

$3050 shipped

 

Oscs, I remember when you decided to pull the trigger on the pg/gv in your build thread. That simple, screw it I'm going for it, post actually sent me down a rabbit hole of research.

I didn't know much about either the powerglide or the gear vendors overdrive, but the more I researched the more I realized that it is THE answer for big power.

Spending that money is a kick in the pants, for sure, but it should provide you with the peace of mind that you did it right the first time. And when the person next to you grenades their transmission at the track, your investment just paid for itself.

 

I've been using the same T56 for about 8 years and, can do 200mph with ease. 70mph is around 1600rpm.

Buy a manual lol

 

That was the plan! It's been working out well so far.

 

I'm starting to think that reusing my T56 might be the better option as far as cost goes. It's already held up to 192 mph in 5th without exploding. I'm just getting a bit tired of driving a stick all the time especially after I screwed up my clutch foot. Kinda sucks that my nice clutch and all wouldn't transfer to the LS platform though.

 

Regarding converter lock up, I'd lock it after the shift into 3rd, unlock it for the shift to 4th and then lock it back down. Monster on the highway, but locking in 3rd only improved mph slightly in the 1/4. Procharged deal, not turbo.

 

I figured I would need to leave the converter unlocked at least until I was safely in 4th gear so it wouldn't transfer as much shock into the trans. I wasn't planning to use a really high stall either, maybe 3000 rpm or so.

I'm actually a bit curious about the OD gear set in the 4l80. It's pretty much the same ratio as the 5th gear in a T56/6060 but everyone says it won't hold up as well. Is it a design problem? Would cryo help to make it last?

FWIW, I sent emails tonight to some vendors who build 80's and T56s so I guess I'll see if I get anything back in the next 2 weeks since next week is Thanksgiving.

 

FYI the part that fails on the 80's is like $300. If you familiarize yourself with the trans you can just treat that as a semi wear item.

 

Billet OD carrier from CK performance and be done.

 

I have a built 4l80 for mine, but it does not have the CK 4l80ecc/boc-b carrier. Can that be added to an existing build, or does it require special modifications?
Thanks.
RonA

 

A built up C5/C6 6spd and diff is stupid expensive.... but for an Fbody just run a new T56 Magnum and be done with it. As long as you aren't launching with tons of boost and powershifting it will take the abuse.

I have a 100% stock T56 Magnum in my 88mm turbo 6.2 RX-7 and it does low/mid 190's in the 1/2 mile (shifting into 5th which is .80 ratio). 21-22psi in 5th gear is one hell of a ride.... on 14psi it made 1060rwhp/1070rwtq. Without a full cage and fire system I wouldn't even contemplate seeing how fast this car would go in a mile all out.

I've shifted the Magnum as high as 7800rpm and no issues. Something to think about vs. an auto that may not shift that high. Off the shelf clutch from McLeod, production slave cylinder, nothing fancy. You are going to need RPMs.... and the more blocked off your front end is.... the better. Meaning oil coolers don't get direct airflow if you need that last few MPH.

If you have room.... I would install a vacuum pump on that motor for the PCV system.

 

New Borg Warner high energy clutches, new seals (and molded pistons), replace bushings where worn, Jake's performance VB recalibration kit (better than Trans go hd2 kit), billet input, billet main, billet forward hub, aluminum direct drum (34 element intermediate sprag will be fine) (don't wanna blow a motor at 180mph and have the direct drum go into warp speed when the output shaft becomes the input shaft and send an iron one through your floor), rollerize a couple critical areas, and like someone mentioned, a competent builder.

 

Suggestions like this is how people die. Please don't give transmission advice. The trans needs a lot more than that.