Re: 4 Speed Owners Must Read!!!!!
I wonder if this is why my trans is acting up, I bought my 72GS455 4 speed used and rebuilt the motor rear end but did not touch the trans because everything seemed Ok when I bought it. I replaced the trans lube with Valvoline 85 weight gear lube. I have driven the car approximately 600 miles and this problem has occurred several times. I will be driving and all of a sudden the trans will come out of gear, it seems to happen more frequently when I am cruising in fourth gear and let off of the gas, it has not happened under acceleration. I checked the gear lube contents tonight and sure enough it is the GL-5. I will change the gear lube with the GL-4 before I drive it again. Is there something else that can be causing the trans to pop into nuetral???
72 GS455 4 speed 1 of 84
TSP built 455. .030 over forged pistons, 9.3-1 cr, TA113 cam, ported 430 heads, TA headers, Performer intake, MSD digital 6 ign. 3.42 gears
Dyno'd at 455hp, 518lbs torque
13.01 at 108mph with a 2.28 60'
65 Lark with 430-4, TH400 13.85/101mph
70 GS455 12.50/113.50mph
72 Stage 1-4 speed Sloan Documented