Bricoop wrote:We're on the last legs of our motor and transmission. I'm fairly confident I want to drop a 302 and T-5 in the truck. After lots of reading, it sounds like this is a poor choice. So of course, we're going to push forward with it. It sounds like 5th gear is the biggest concern. There's a lot of differences in T-5s. I'm currently looking at using one from a 94/95 mustang GT. It sounds like there's some differences in these models that will give us a shot at surviving. Someother things we're planning on.
Keep RPMs <4500.
Replace aluminum bearing retainer with a steel one
Set the preload properly
Scuff the bronze syncros
Granny shift
Any other ideas out there?
Use the Carbon fibre replacement Synchros. 1-2 2-3 3-4 are friction compound NOT brass. So no using Gearbox oil, and Pre-Soak them to get goodness in all the fibers.
Universal industry recommendation is Redline D4 ATF as it's compatible with the 5th gear synchro, and provides proper friction modifier for the Clutch surface like other Synchros while being stable at High temp.
Also if you're in there, change the Fork pads, they get brittle and you don't want to end up stuck in a gear. Also use the correct Anerobic sealant NOT RTV. A transmission assembly lube will be your friend too. We used Dr. Tranny which sounds way hotter than it actually is. But is gooey enough to keep the needle bearings and such guked together while putting the shaft back in...........None of this is as hot as it sounds...
We used SA Design SA103 "How to Rebuild and Modify High-Performance Manual Transmissions By Paul Cangialosi https://www.amazon.com/Rebuild-Modify- … 1934709298 And our T-5 has been happy since the rebuild 3-4 races ago.
They're good to about 350 HP as a world class like from 90's Mustang. And like other's I'll also repeat. 5th gear sucks for racing. V8's came with a 0.68, the turbo 4 had a 0.79 but much harder to find. There's also an available 0.80 out there for $100 https://www.5speeds.com/cart/index.php? … duct_id=65 Which I wish we put in when we did ours. Seriously 0,68 belongs nowhere near a track. And even then, the 5th synchro sucks if you wound out 4th gear, so it takes forever to shift, and nobody makes JUST a regular helical dog 5th. By the time you get it in 5th you'll have lost enough momentum to need to be back in 4th.
https://www.moderndriveline.com/the-man … of-the-t5/
http://www.britishv8.org/articles/borg- … d-tags.htm
https://www.thegearbox.org/T5.html
https://www.5speeds.com/cart/index.php? … duct_id=61
Oh and in most Mustang T-5's......NO REVERSE BRAKE! you will fight and grind the bastard into reverse every time.
Mistake By The Lake Racing (MBTL)
88 Thunderbird "THUNDERBIRDS ARE GO!", Ex Astris, Rubigo / Semper Fracti
A&D: 2014 Sebrings at Sebring (NSF), 2014 NJMP2 Jurassic Park (SpeedyCop), 2012 Summit Point J30 (PiNuts)
2018 Route Sucky-Suck Rally Miata, 2019 World Tour Of Texas 64 Newport