GS-T_Newboost
15+ Year Contributor
- 248
- 2
- Sep 13, 2007
-
Savannah,
Georgia
ok the reason i am asking about built 420a transmissions is because my buddy broke his this weekend at the track. hes running built 420a with a 35r setup on 15 psi and he was on 24.5x8 in slicks. hes useing a dxd stage 5 clutch so theres no problem with slipping just transmission failure. stock neon 355 trans and diff. we pulled it out and tore it down and all the teeth off of the ring and pinion were striped off and the pinion bearing in the bell houseing was fried. left in first easy went to second and it broke. we got it home and the shifter cabel bushing was off. so it happened when it broke or is the reason that it broke. were woundering if anybody else is haveing tranny failure from hard launches or higher then normal hp. we contacted south bend and were going to have the ring and pinion gear cryo treated and shot peened to help strengthin them up any other suggestions. anybody ever heard of double syncroing these trannys or replacing with full brass syncros?