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75 G20 driveline question #747705
April 26th 2019 4:55 pm
April 26th 2019 4:55 pm
Joined: Jul 2016
Posts: 18
north pole ak
T
trykflyr Offline OP
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trykflyr  Offline OP
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Posts: 18
north pole ak
Was under my beast the other day and noticed the driveshaft just aft of the center support bearing has about 2 inches of splines showing. Just had the engine & tranny ( can I safely say tranny on here?) replaced but couldn't say for sure if it was like that prior to. I suspect it's normal for a 2 piece driveshaft, but it sure looks odd..... Thoughts from those with experience, please.

Re: 75 G20 driveline question [Re: trykflyr] #747707
April 26th 2019 5:26 pm
April 26th 2019 5:26 pm
Joined: Jun 2010
Posts: 14,553
Van Diego California
frscke1 Offline
frscke1  Offline

Joined: Jun 2010
Posts: 14,553
Van Diego California
No its not normal ... did they replace the motor/tranny with the same length motor/tranny ? bet not .. there is some play length wise for when the body floats ... like when you go over a hill the spline slides in N out. but there is only so much spline ... if you see 2" thats half of it.

My '92 G30 EXT ...an inch or less stickin out passed the carrier bearing ...

[Linked Image]

[Linked Image]





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: 75 G20 driveline question [Re: frscke1] #747710
April 26th 2019 5:43 pm
April 26th 2019 5:43 pm
Joined: Jul 2016
Posts: 18
north pole ak
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trykflyr Offline OP
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trykflyr  Offline OP
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north pole ak
Thanks! I'll get back underneath and recheck, but I'm fairly certain everything was the same going back in.

Re: 75 G20 driveline question [Re: trykflyr] #747711
April 26th 2019 5:51 pm
April 26th 2019 5:51 pm
Joined: Jun 2010
Posts: 14,553
Van Diego California
frscke1 Offline
frscke1  Offline

Joined: Jun 2010
Posts: 14,553
Van Diego California
Either way I would get the rear drive shaft lengthened by an inch or so to put more of the spline back in the receiver ..... something changed different rear end ?


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: 75 G20 driveline question [Re: frscke1] #747733
April 27th 2019 12:23 pm
April 27th 2019 12:23 pm
Joined: Jul 2016
Posts: 18
north pole ak
T
trykflyr Offline OP
stranger
trykflyr  Offline OP
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Joined: Jul 2016
Posts: 18
north pole ak
Only powertrain things I've done to it since I bought it are the engine and trans. Engine's a basic 350; it was a replacement long block. The trans, now that I think about it, was removed, rebuilt and reinstalled. I'm fairly certain it's the same unit that came out. I'll crawl under and measure the exposed splines. Not having much luck finding an acceptable dimension in any of the books I have.

Re: 75 G20 driveline question [Re: trykflyr] #747753
April 28th 2019 2:49 pm
April 28th 2019 2:49 pm
Joined: Mar 2011
Posts: 352
NY
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jcd74 Offline
enthusiast
jcd74  Offline
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Joined: Mar 2011
Posts: 352
NY
You know you made me look, mine is the same. I'm 89 g30 th400, Spicer drive shaft, Dana 70. Maybe a difference between Dana and the 14 bolt? Will try to post pick later.

Re: 75 G20 driveline question [Re: trykflyr] #747814
April 29th 2019 5:04 pm
April 29th 2019 5:04 pm
Joined: Jul 2016
Posts: 18
north pole ak
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trykflyr Offline OP
stranger
trykflyr  Offline OP
stranger
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Joined: Jul 2016
Posts: 18
north pole ak
Things look like they've been this way a while based on the crud pattern on the belly. I'll do some prodding at a couple shops here in town, see what the thoughts are. I'm curious....


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