Thread: 1999 gtp no overdrive

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  1. #1 1999 gtp no overdrive 
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    My sons car stopped shifting into od. Shifting from drive to 3rd gets no change in the rpm's. Do these trannys have a modulator? Any thoughts would be helpful. thanks.
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  2. #2 Re: 1999 gtp no overdrive 
    Killa Bee Scottydoggs's Avatar
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    you need a new 4 th gear hub, its a 40 dollar part, but the tranny needs to have the side cover taken off and installed. not exactly a easy fix.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  3. #3 Re: 1999 gtp no overdrive 
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    Thanks for the quick reply Scotty, I think I will take a look. Do I need to drain the fluids to take the cover off?
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  4. #4 Re: 1999 gtp no overdrive 
    Killa Bee Scottydoggs's Avatar
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    dont think so, but you should do a pan drop and filter change, the splines wear off and they have to go somewhere right?

    im pretty sure theres a how to here done by billboost37, search his name with "easy" in the search, it will bring up all his how to threads.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  5. #5 Re: 1999 gtp no overdrive 
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    Looked at Bill's how to's and I can do this. Also watched a video, a lot of work but it can be done. Where do I find this part and gaskets. orielly has the side cover gasket but no gear.
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  6. #6 Re: 1999 gtp no overdrive 
    Killa Bee Scottydoggs's Avatar
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    ebay believe it or not lol its about 40 or less. just make sure its the upgraded hardened shaft.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  7. #7 Re: 1999 gtp no overdrive 
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    Hey scotty, how the frick does a guy get the wiring harness loose from the top of the tranny?
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  8. #8 Re: 1999 gtp no overdrive 
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    the fat oval one? pinch it from the left and right side pull it off. your mushing the the sides in. theres no other clips. squeeze and wiggle it off.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  9. #9 Re: 1999 gtp no overdrive 
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    The power steering pump. can I just remove the bottom bolt from the sub frame? got to be 2 of them right?
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  10. #10 Re: 1999 gtp no overdrive 
    Killa Bee Scottydoggs's Avatar
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    why the p/s pump? you pulling the engine out?

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  11. #11 Re: 1999 gtp no overdrive 
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    No Video I watched said to. I bet its the accumulator or something like that.
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  12. #12 Re: 1999 gtp no overdrive 
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    pump shaft and pump maybe. ive not done this job myself. best to read bills how to closely, iirc theres pics and diagrams with the bolts marked to leave in and those to take out.

    as i under stand it you dont want to open the valve body leaving a few bolts in keeps it on one piece.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  13. #13 Re: 1999 gtp no overdrive 
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    Just a quick update Scottydoggs, after a few choice words the cover is off. Thanks for the help. Gotta thank Bill too, used his how to.
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  14. #14 Re: 1999 gtp no overdrive 
    Killa Bee Scottydoggs's Avatar
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    congrats my man. you got bigger balls then most. i cringe at the thought of going inside a transmission.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  15. #15 Re: 1999 gtp no overdrive 
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    Got the culprit out. 3/4 of spline is missing. thanks again.
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  16. #16 Re: 1999 gtp no overdrive 
    Killa Bee Scottydoggs's Avatar
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    now you gots an industrial paper weight.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  17. #17 Re: 1999 gtp no overdrive 
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    Wow. That a good day! Wish I had the guts to try that if I needed.


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  18. #18 Re: 1999 gtp no overdrive 
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  19. #19 Re: 1999 gtp no overdrive 
    Killa Bee Scottydoggs's Avatar
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    well thats about worn to the nub there lol

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  20. #20 Re: 1999 gtp no overdrive 
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    Update! Job completed. Gotta thank you guys for helping out. Would I do it again? Maybe.
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