LS1 4L60E Shift Kits??
LS1 4L60E Shift Kits?? Trying to figure out what Shift kit to go with for trans.. B&M 70360, TCI Auto 376001, TransGo SK 4L60E, TransGo 4L60E-HD2. trying to do this build on a budget, and not going to build a trans until i need to. picking up a used Yank PT 4000 this week, and figured id do Converter, Cooler, Truck pan and shift kit at same time i install my new LTs and Y. This is my first A4 car, my pass three Fbodys have been M6s. B&M is cheapest it seems and its a Shift Improver kit, which i installed these in TH350 and 400 and worked great.. Any input, experience, suggestions?
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The TransGo Performance Shift kit is the way to go. This will give you what you need, smooth part throttle shifts with quicker and firmer shifts with more throttle. You already have the Corvette servo. The kit can be matched to what you have done to your motor, the Yank PT 4000 torque converter, the 3.73 rear end gear ratio and how you plan on driving.
Last edited by RevGTO; Jan 13, 2014 at 11:55 PM.
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The B&M is really only for 16 and 17 year olds that want to chirp their tires in their 200HP V6. Since it completely disables the 1-2 accumulator, when installed in a powerful V8 the ultra-abrupt 1-2 shift can break the trans or driveshaft. At least thats what some trans builders have told me.
Another good kit is the Sonnax Performance Pack for about $129. The "enhanced" Transgo HD2 kit that PBA referenced adds a few more useful parts to make it similar to the Sonnax kit. The bare HD-2 kit is $80 at Summit.
Another good kit is the Sonnax Performance Pack for about $129. The "enhanced" Transgo HD2 kit that PBA referenced adds a few more useful parts to make it similar to the Sonnax kit. The bare HD-2 kit is $80 at Summit.
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DO NOT install any of the spacers in the accumulator that are offered in the TransGo HD2. I remove them, as they only make the part throttle 1-2 shift much firmer, which is not what you want for transmission longevity.
Last edited by RevGTO; Jan 13, 2014 at 11:56 PM.
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Well I was just going to put Transgo kit in myself and put in the Yank 4000 I picked up but after pull trans out I decided to just take it to my tranny guy and just have him build me a trans to last and install trans go kit.
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Verdad Gallardo Moderator
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From: Ann Arbor, MI
First, the HD2 is not trivial to install if you have never worked on a valve body before.
Second, many builders advise AGAINST installing a shift kit into a well-worn trans.
I noticed that very experienced PBA advised against installing any washers into the 1-2 accumulator. While that certainly is good advice for longevity, you might find the 1-2 shift too soft with a 4000 stall converter. You may prefer one or even two washers; in any case it is easy to change the number of washers later. You can also change the part throttle shift firmness by tuning.
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From: Wichita KS / Rancho San Diego
I noticed that very experienced PBA advised against installing any washers into the 1-2 accumulator. While that certainly is good advice for longevity, you might find the 1-2 shift too soft with a 4000 stall converter. You may prefer one or even two washers; in any case it is easy to change the number of washers later. You can also change the part throttle shift firmness by tuning.
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From: Turnin' Wrenches Infractions: 005
I'm running the HD2 also, trans builder recommended it. I still have upped line pressure in the tune and the shifts are decent, but a 4k converter sucks up a lot of the feel.
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I'll be installing a 3k fti lockup converter. I'm not to worried about how hard it shifts but more of how fast, did it give you faster shifts even with the converter?
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From: Turnin' Wrenches Infractions: 005
Honestly, I got the trans tune on a stock trans first. Shifts felt awesome. Went to a built trans and the TG kit and everything basically felt the same as the stock trans except the low throttle 1/2 was super harsh. I went in the tune and took out some of the upped pressure in that specific throttle region and it went back to what I was used to. So basically the kit didn't add anything to the shift "feel" but I do feel like it is absolutely worthwhile. As far as shift speed I can't really say, again the converters soak up so much it would be hard to give an accurate assumption.
Teching In
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Honestly, I got the trans tune on a stock trans first. Shifts felt awesome. Went to a built trans and the TG kit and everything basically felt the same as the stock trans except the low throttle 1/2 was super harsh. I went in the tune and took out some of the upped pressure in that specific throttle region and it went back to what I was used to. So basically the kit didn't add anything to the shift "feel" but I do feel like it is absolutely worthwhile. As far as shift speed I can't really say, again the converters soak up so much it would be hard to give an accurate assumption.
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With the adding a small diameter torque converter the shift feel will be less noticeable (soft). The shifts themselves will actually be quicker due to the less mass that has to be slowed on down on the shift, just the opposite of what you think is happening. This is good, less shock on the gear train. The adding of the spacers to the accumulator for the 1-2 shift will only make the part throttle part of the shift quicker and more noticeable, but it will do very little if anything for full throttle part of the shift. As long as the WOT shifts are fairly quick and not to firm, you will get the best chance at a long transmission life and not breaking any parts. You want a smooth part throttle shift and the shift getting quicker with more throttle. If you need a quicker shift at WOT, then you will have to open the 2nd gear feed hole slightly. For the 9.5" torque converter with 2,400 - 3,200 rpm stall, 3.42's - 3.73's and driving moderate to moderately aggressive, I use .093" - .096" 2nd gear feed hole in the separator plate. With more stall and or more aggressive driving I use a .096" - .099" feed hole. This is with using the Corvette servo.
Teching In
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How about tranny coolers, I was looking at the mishimoto. It has its own cooling fan built into it.
http://www.summitracing.com/parts/mio-mmoc-f
http://www.summitracing.com/parts/mio-mmoc-f
Last edited by Maximus23; Feb 9, 2014 at 12:38 AM.
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From: Turnin' Wrenches Infractions: 005
Absolutely, they are pretty silly when they are stock. Funny part is, they are like that in everything it seems. I remember driving a suburban with a 60e and it did the same dumb stuff when pushed hard.