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Hello. Need help with 81 g20
#764463 August 05th 2020 7:59 pm
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Hello everyone. Glad to be here. Looking to upgrade transmission from 400r to 700r. Is this possible for a 1981 g20 1ton? Seems to be the drive shaft is too small and the ubolt is on the wrong side of it. Thanks.

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Re: Hello. Need help with 81 g20
Roots #764465 August 05th 2020 10:15 pm
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Welcome to the site ..... I have 4L80E in both of my G30 1 tons .... maybe a 4L60E would be good.


Again welcome

Question is it a G20 or a G30 .... G30 is a 1 ton a G20 is a 3/4 ton


SUNSHINE VANS-VAN DIEGO
ADRENALIN BY THE GALLON & CHASIN RACIN
ONE FOR THE DIRT & ONE FOR THE STREETS
'93 CHEVY G30 454 4X4 SPORTVAN EXT 146" WB
'92 CHEVY G30 454 BEAUVILLE EXT 146" WB
Re: Hello. Need help with 81 g20
frscke1 #764466 August 05th 2020 10:26 pm
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Then it's a 3/4. Says sportvan on the side. Are those 4speed?

Re: Hello. Need help with 81 g20
Roots #764467 August 06th 2020 1:58 am
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A 4L60E is a electric overdrive 4 speed ... great trannys


SUNSHINE VANS-VAN DIEGO
ADRENALIN BY THE GALLON & CHASIN RACIN
ONE FOR THE DIRT & ONE FOR THE STREETS
'93 CHEVY G30 454 4X4 SPORTVAN EXT 146" WB
'92 CHEVY G30 454 BEAUVILLE EXT 146" WB
Re: Hello. Need help with 81 g20
frscke1 #764477 August 06th 2020 12:23 pm
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Ok nice. Thanks for the help.

Re: Hello. Need help with 81 g20
Roots #764479 August 06th 2020 12:28 pm
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Good Luck . Pics are Always appreciated. smile

Re: Hello. Need help with 81 g20
SDMickey #764486 August 06th 2020 4:13 pm
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I can not seem to figure how to post pics? Either way I might sell it and get a newer model.

Re: Hello. Need help with 81 g20
frscke1 #764499 August 07th 2020 1:42 am
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What lift kit for a g30 do you recommend?

Re: Hello. Need help with 81 g20
Roots #764500 August 07th 2020 5:22 am
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there is no "kit" for a G30 .... mine is a solid axile N leaf springs ... 2" body lift and a 1" suspension lift .. done by 4Wheel in Salt Lake City for the Govt before I got it.

There is a thread that A guy is tryin to lift a G20 ....

https://www.vanning.com/threads/ubb...2wd-lift-kits-front-only.html#Post764392


SUNSHINE VANS-VAN DIEGO
ADRENALIN BY THE GALLON & CHASIN RACIN
ONE FOR THE DIRT & ONE FOR THE STREETS
'93 CHEVY G30 454 4X4 SPORTVAN EXT 146" WB
'92 CHEVY G30 454 BEAUVILLE EXT 146" WB
Re: Hello. Need help with 81 g20
frscke1 #764510 August 07th 2020 2:24 pm
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Ya saw that already. Just got the van back right now right now and it runs good. We shall see what I do with it.

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