X2. Had a Trans-Go shift kit installed when I had my brother's Plymouth 904 automatic rebuilt. Shifts normally in Drive, and manually when you drop it down into Low and Second. Nice crisp firm shifts. :thumbsup:
I believe I used a NAPA shift kit rather than the B&M kit in a TH400 when I was younger. Was told it would do the same thing, but it was cheaper in price. It did the job.
No need to buy a kit. You can modify the separator plate for free. There is information on exactly what to do on line.....you can probably find it by googling "TH400 separator plate modification" or the like. I got my information from Jakeshoe's transmission 8 or 9 years ago. Drilled two holes slightly larger, and it firmed up the 1-2 and 2-3 shifts. No need to go crazy, and drill huge holes, or the unit will really bang shift all the time. I went to a .090" hole, I think, instead of the recommended .120" It worked great. All you are doing is allowing more fluid into the circuit faster to apply the clutches faster and harder, basically. There's a guy on the PY forums, Half inch Stud, who is very knowledgeable about this procedure.
Something else you can try easily is a fluid type change. Ford Type F instead of Dexron has been known to wake them up quite a bit.
Also, the "Jakeshoe" that GeeTee referred to is the guy who built my TH400 for my car. He has a transmission shop just north of Denton, TX. He doesn't use anyone's kit on his builds, instead he has developed his own calibrations over the years. He has his own transmission dyno that he tests every build on before he returns them to a customer. Mine has been trouble free.
Good info guys, thanks!! I'll do some research, unfortunately I ordered a Transgo kit last night after reading around. I can always return it... Tranny is on the list after my cam gets here anyway. I've had a slow leak for 22 years from the tranny when cold. It will be sorted out this time!
Hello all. I jumped in my 66 Tempest last night, took it for a drive and found that it wouldn't shift out of 1st gear. It's a 2 speed automatic transmission. The previous owner put a 455 from a 1970 Grand Ville in it but i'm not sure what type of trans it is. Is it a Powerglide? Anyway, it...
I have a 69 GTO with a 8.2 Limited Slip and I have a 8.5 Limited Slip from a 1985 Olds 442 with 3.73 gears and the 200 R4 overdrive trans as well.
Has anyone put a 80's 8.5 in their older Pontiac.
It looks like the overall width dimension on the 8.5 are 3" shorter and the shock holes are 2"...
66 GTO Super Turbine 300 2 speed trans is leaking from passenger side. I have already replace the pan gasket and still has the same leak coming from the passenger side. What could be causing this??? Thank you for any information is advance!!!!
Hi, hoping someone can help me. I have a 71 GTO convertible which I have had for 20 years. About 15 years ago I purchased a THM 400 automatic transmission with a switch-pitch stall designed for high performance. At the time I intended to drag race the car but never did. It is just a...
Ive read for 2 days and searched for exact body mount locations on this 67 Lemans. Does anyone have a schematic or diagram showing locations of all the body mounts?? Any help would be much appreciated before I start tearing into it... Thank you