Aisin 5-speed Manual rebuilder or upgrades?
My issue is I believe the Synchro's are giving up on my stock Aisin AR-5 Transmission. My Car is a LS2 powered Mallet Conversion early 2006 Build (November 2005) so from what I have been reading it will have the early Synchro design. My problem is the car is Stock as it came from Mallet and I would like to keep it that way, so I don't want to replace the transmission, but just rebuild it with more durable parts.
Does anyone know of a rebuilder with experience with these transmissions? I am aware of the more durable carbon fiber synchro option that was used in the Hummer H3 version of the trans.
The car has about 23,000 miles on it, and the 2-3 shift is getting difficult unless I double clutch it, but that does not help acceleration. I did drain and replace the fluid with Royal Purple 70/90 full synthetic about a month ago. It has helped but not eliminated the problem.
I believe the Trans was having issues when I bought it, as the car would "jump" a little when you came to a complete stop, then placed the shifter into 1st gear. Now the other symtoms have arose.
Certified Pontaholic & Former Jet Mech
1969 Firebird Sprint 301 OHC-6, T-5
1971 Catalina Freeway Enforcer 455
1973 Lemans Safari 400 4-speed
1977 Astre Formula 215 V-8 T-5
1978 Sunbird Safari 231 V-6 2004R
1978 Catalina Safari Soon to have a Pontiac 400 4bb
2006 Mallet Solstice LS2 6-speed Manual
2009 G8 GT