i just replaced the engine in my 99 grandprix the new enginge is a 3.8 lkiter 3800 series II v6 my speedometer has stopped working and now it wont shift outta first i have replaced the speedometer sensor with no prevail what could it be are the two problems linked?

Asked by Sep 06, 2012 at 04:44 PM about the 1999 Pontiac Grand Prix 2 Dr GT Coupe

Question type: Maintenance & Repair

car wont shift new motor speedometer wont work replaced speedometer sensor

2 Answers

9,755

Double check everything and make sure everything is hooked up and bolted back up properly. Very easy to overlook something when you are swapping a motor (been there and done that).

6,705

did u put the vaccuum modulator hose on the transmission(from the throttle body intake area)? that is used if your car is not a electronic transmission. i'm more familiar with buicks but most have that set-up before 2000 models, i think.

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