View Full Version : Best Shift Kit for a TH350?
Fusion17
08-10-2007, 01:29 PM
I am trying to figure out which is the best one to go with? Please help, and if there are any product reviews on shift kits for the TH350, that would be most helpful. Thank you.
Texas Hotrod
08-12-2007, 04:25 PM
Most rebuilds that I do are for street driven vehicles, so a full-blown race kit isn't needed.
I've had great luck with the Gil Younger brand (available through most tranny parts suppliers), it should be the # SK350 kit. They work great and are really cheap. I've used a bunch of them over the years, as for the 700R4s that I've done also.
W/some kits you need to drill the valve body spacer plate, this one comes w/a new plate.
Install a "red stripe" vacuum modulator. If shifts aren't as crisp as you need them, the modulator has an adjuster screw so line pressure can be cranked up as needed.
I just finished a TH350 in a 4X4 mud truck. It has a stout engine and huge tires. I used this same kit and it shifts nice and crisp.
There's one extra mod that I do that isn't in the directions. I make a spacer pin that takes the place of the 3rd gear accumulator spring (accessable from the external side cover). The accumulator is spring loaded, which cushions the 3rd gear shift. If the stock spring is used it will have a good 1/2 shift, but a mushy 2/3 shift.
I usually bon't mess w/the governor springs. It's usually fine w/the stock set up. I'll adjust the down-shift (detent) cable before I change governor springs. If WOT upshifts are too early, then lighter governor springs are needed (but that's a whole other issue).
Good luck.
NOT A TA
08-12-2007, 08:34 PM
I've used the B&M Shift kits a couple times with no problems. Currently have one in T 350 in my 70 Firebird used for Drag, mile, and road course open track days. Read and follow instructions carefully!
Jayco_Automotive
08-17-2007, 07:58 AM
I use Transgo Shift kits, and perfer them over all other....
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