Thread: No 3rd gear upshift

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  1. #1 No 3rd gear upshift 
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    1-2 is fine. Rev to 4k, let off throttle and she shifts fine into OD. If I give it gas, at say 50mph, it will downshift fine into 3rd but will go back to OD as soon as I go to part throttle. Dropped pan, checked accum pistons.look fine. O-rings are ok, center shafts are tight, no slop. So, I yanked trans and stuck in another unit. My car is 99 gt and has 9BCB trans tag. Got a trans from 99 venture which also has 9BCB tag. Car shifts Fine with new trans. But I am curious to open up old trans and see what's up.
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  2. #2 Re: No 3rd gear upshift 
    Killa Bee Scottydoggs's Avatar
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    you lost 3 rd gear, time for a rebuild or a used one swapped in.

    i am also a member of the i lost 3 rd gear club. it sucks. used tranny was the 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: No 3rd gear upshift 
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    Other threads say 3rd gear sprag. And burnt band.
    Last edited by cavell; 08-15-2013 at 02:35 PM.
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  4. #4 Re: No 3rd gear upshift 
    Killa Bee Scottydoggs's Avatar
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    when you just pop the shiftier to 3 rd when at highway speed its kinda in neutral, when you give it gas it needs enough to power second gear, and its a lot like you know.

    i drove for a good month like that, then drove it 2 hours to get swapped out. you dont even think about passing on the highway either 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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  5. #5 Re: No 3rd gear upshift 
    Turbo is the way to go. BillBoost37's Avatar
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    There isn't a band for 3rd only. The forward band works all forward gears. Likely it's a broken sprag or cooked third clutches. If you pull it apart, I'd think you'll find a ton of slop in the 3rd/input housing on the clutch packs.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  6. #6 Re: No 3rd gear upshift 
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    been told if 3rd is gone, than i should not have 4th. i can drive all day in 4th just fine. i did see a slight variation in tach on 100 mile drive to dads shop. seemed to waver 100 rpm or so occasionally. but, old trans is out and sitting in corner.
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