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1st Generation Dodge Cummins 89-93 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with Rotary Injection Pumps

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  #1  
Old 09-02-2013, 11:16 AM
Diesel Fan

   

Default Auto Transmission slow shifting?

I have a 91.5 cummins with an automatic transmission, it seems like the rpms are going way higher than they should be for it to shift. To get from first to second I have to let of the pedal. Is this normal for these trucks or is something messed up?
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  #2  
Old 09-02-2013, 12:08 PM
Diesel Enthusiast
Status: Old and inferior newbie

   

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Adjust your throttle valve cable. Denis Hruza - Dodge CTD - Throttle Lever Adjustment (Kickdown)
You may need to fine tune it from there. I had to slide mine back a little.

cougar's Sig:1992 W250 auto
RIP 1991.5 W250 5 speed 1991.5-2013 fair well old friend
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  #3  
Old 09-02-2013, 06:57 PM
Diesel Fan

   
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Is the engine stock or is it turned up a bit?
The stock torque converter is so mushy that if you turn up the power at all, the motor will push thru the converter and hit the governor. Mine did that till I put in the DTT 89 converter. I was told that DOdge put in the junk converter to save the weak tranny from the tork of the cummins.

Joel Steven's Sig:1993 D350 Cummins club cab Always loaded, always towing
3.55 gears, beefed up Automatic with DTT 89 converter and manual switch for over drive, fuel screw maxed out,fuel pin rotated, timing bumped up, dowel pin killed, K&N filter, 4" exhaust, 5 x .012 injectors, HE351cw Holset turbo EGT, boost and TT guages, rear antilock killed, Bilstien shocks, head light relays, rostrum electronic cruise control
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