what is the over drive controlled by? Is it a electrical thing? I have every gear except that one. It's only on certain occasions i don't have it but now i'm not sure if i'll get it back? -

Rocky Mountain Texan's Sig:

*Daily Driver-93 ctd 5'' exhaust, pump mod, bully dog power pin, 3200 rpm govenor spring, heavy duty transmission cooler, k&N
*Project-97 12 valve 4x4 cummins dually,(For Sale)
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im pretty sure if i remember correctly the overdrive is controlled by the computer which bases its shift pattern from the throttle position sensor, the engine speed sensor, and possibly the vehicle speed sensor (i think thats the 3rd one). there is also normally an overdrive off button used as well located inside the truck -

tltruckparts's Sig:

1995 Chevy K2500, 1993 Cummins 12 valve Turbo Diesel IC, Auto Trans 46rh (518) w/ OD,
NP205 Transfercase, SAS w/ GM Dana 60 front, Corporate 14 1 ton rear with disc brake conversion on 35's. 1/8" timing bump, upgraded pump with 3200 spring, SDX 5x14 injectors, airdog II 165, Autometer Ultra-Lite EGT, Boost, and Trans Temp gauges, M&H M3 Fuel Pin

ya i can turn the light off and on but it wont shift into that last year. all it'll let my truck go is about 75mph -

might need to adjust your TPS. There is a thread on how to do it in teh sticky. -

RSWORDS's Sig:

is tps throttle position sensor? -

yes -

thanks thats a awesome right up! -

switch on top of pump -

diesel pap's Sig:

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