SAmuscle

Hey guys (and gals)! Just picked up a 1978 Corvette. Seems to be all original except for a 600cfm Edel carb and exhaust. I just purchased the Transgo 1-2 shift kit. As many before me, I purchased the "pro kit"
(AKA no instructions needed because you need to know them already). Now I've read Jake's article on NastyZ28. I'm planning on drilling the 2 and 3 feed holes both .125". I'm wondering if this is an adequate size and if that is the only drilling needed? Once again, the motor is stock. It's my sunny day cruiser so I'm just looking for easy shifting but some tire chirp if I have to get on it. I do plan to tear it down this winter and bore it .030" over, run stock heads, Edelbrock Performer intake, summit longtubes, and their K1103 cam with flat top pistons. So nothing too major as far as adding power. I would like to know from those who have installed the kit if that is the only drilling required? Thanks for the input! And don't hesitate to add a topic link. I've googled everywhere and Jake's article is the only one I found.

d555

Turbo 350? Check out u-Tube Videos on Transgo kit Install

Dave

Danny.reamer

I just did my th350 a couple weeks ago and I went to YouTube and just followed along with the video and it was easy. I also have a stock 350 with the exception of the 600 edelbrock and a performer intake and I decided to pot the "race only" spring in and I couldn't be more happy. It shifts smooth if just driving regularly but if you are getting down on it it will put you in the seat when it shifts(no chirp though).i didn't drill any holes but let me know how that works I might have to go back in there

SAmuscle

All the youtube videos I found showed no drilling. I was told I'd be fine using the B&M instructions for drilling holes. Basically I just want to drill the 2nd and 3rd feed holes to .125". B&M states 3/16" but one of the techs at my shop said that might shift a little hard for just a street cruiser.

TimAT

I've used a bunch of Trans-Go shift kits in TH350's, 400's, 200-4r's and 700-R4's. The instructions that come with the kit have always seemed pretty well detailed and have never caused any problems.

SAmuscle

any chance you could tell which holes you drill and how big? B&M says for street/strip, drill the 2nd and 3rd oil feed to 3/16" . For HD truck or towing drill the 2-3 accumulator feed 3/16".

TimAT

I'd drill them all to the HD/street/strip specs. Or level 3, what ever set of instructions came with your kit. I'm not at home so I don't have access to any of the paperwork if I kept any of it.
One of the things that kills automatics is slipping. You want all shifts as firm and solid as you can get them.
I'm not real big on B&M's kits. They were priced higher than the Trans-Go or "Mr. Transmission's Gil Younger" kits, and pretty much do the same thing.

SAmuscle

Thanks for the info! So according to B&M the 2nd, 3rd, and 2-3 Acc feed holes should all be 3/16". That looked huge to me! But I went out and ran some bits through each of those feed holes. Seems transgo is a step ahead. The 2-3 Acc was already 3/16". And it seems that the 2nd feed hole was already at 1/8"... I think I'll keep it that way. I've read other threads and everyone says .125" for 2nd. And the third I drilled out to 1/8". Next step up would be 5/32" which I heard is a tad large for just a street build.