My 75 LeSabre convertible has a 455 with stage1 heads and a TA 212 Cam. I recently had the transmission repaired and they added a Transgo shift kit 400-1&2 It is shifting very hard into second even at slow speeds. As this is a cruiser, the bang when it goes to second is starting to bug me. Unfortunately the shop (Wilf's) near me that did the work has sold the property and closed. Is the Transgo shift kit adjustable so I don't get the hard shifts into 2nd? Also if any one could recommend a transmission shop to do the work in Vancouver B.C. it would be appreciated Thanks Robert
I installed one in my TH350 A couple years ago and in came with two different springs to choose from. One was for the street and the other was for the Strip . I installed the street spring and it has A nice crisp shift in 2nd and 3rd. It kinda sounds like someone installed the strip spring in yours making it hit really hard.
Thanks for the info, that is what it feels like, If I really accelerate hard it doesn't seem as noticeable but for cruising around town it is a pain!
X2 on this^^ I just did my th400 with the same kit and used mostly the street parts but drilled the holes in the separator plate larger than their recommended specs since their hole sizing is very conservative. I also did alot of other mods and upgrades to make the trans stronger and better. Talk to member Bens99gtp on this site he's got alot of really good info. I'll try and add some links of his for you to read. http://www.v8buick.com/index.php?th...-kit-and-a-few-easy-internal-upgrades.342929/
Thanks for the info, I will have to have a shop do any adjustments as I simply don't have the space or place to do the work myself....
If you have an adjustable vacuum modulator, you could try adjusting it for softer minimum throttle shifts. If you don't have an adjustable modulator, get one and try adjusting it.
I'm not familiar with the trans go kit as I never buy a shift kit, it's just easier to do it without one, so without know fully what other mods they did it will be hard to tell you how to soften it up. But my guess is the hole in the plate is too large and if so it will take a new separator plate, or a stk one to start with.
Some checkballs can be omitted, some can't. I would have the li e pressure checked as well, some shop put a larger spring and then shim it way up, you dont need 200,250 psi to make these hold and last. In fact if too high of pressure and cast iron sealing rings are used, you can actually turn those things into tiny saws inside the trans........
Here is a link to the shift kit I am using..... https://www.summitracing.com/int/parts/trg-400-1-2/overview/
That's the same kit I used also. I also put in a 34 element sprag, JW 9.5" converter and did some of Ben's mods.