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Old 02-01-2016, 11:01 AM   #1
Busted67
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71 Stepvan gear change

Been looking around and I'm having trouble finding the right series carrier. Research says we got a 3.73-4.10 gears and we're trying to go to a 3.08. I would love to put 3.08's on what I got but not sure if it will work. Thanks for any help.
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Old 02-01-2016, 12:34 PM   #2
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Re: 71 Stepvan gear change

What size step van 1/2, 3/4 ton etc?
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Old 02-01-2016, 12:47 PM   #3
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Re: 71 Stepvan gear change

Half ton p10
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Old 02-01-2016, 12:55 PM   #4
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Re: 71 Stepvan gear change

A 3:08 ring and pinion will not fit on the carrier in your rear end, if your stepvan is a Chevy it should have a trailing arm rear suspension, you might just search around for 3:08 rear axle assembly out of a 71-72 Chevy pickup, a majority of them came with the 3:08 ratio and will bolt right into your P10
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Old 02-01-2016, 01:03 PM   #5
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Re: 71 Stepvan gear change

Are they the same width because it's bagged and pretty close as it is.
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Old 02-01-2016, 01:04 PM   #6
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Re: 71 Stepvan gear change

It's my wife's business vehicle btw.
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Old 02-01-2016, 09:14 PM   #7
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Re: 71 Stepvan gear change

If it is a 71 with the factory 5 lug axles, yes it is the same width as the pickups
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Old 02-02-2016, 12:00 AM   #8
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Re: 71 Stepvan gear change

check summit racing.com I was able to buy a3.73 that fit my 3.08 carrier and I think they sell 3.08 that will fit your carrier.
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Old 02-03-2016, 01:52 PM   #9
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Re: 71 Stepvan gear change

Thanks I'll check that out.
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Old 02-03-2016, 02:01 PM   #10
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Re: 71 Stepvan gear change

the brand I bought was Richmond gear
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Old 02-03-2016, 02:05 PM   #11
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Re: 71 Stepvan gear change

FYI... you may want to double check me on this... but...
I believe the wheel bolt pattern on your van may be 5 on 4-3/4"
So swapping in a different rearend may lead to other changes,
such as swapping your orig van housing axles back in or else a wheel change.
But please double check your wheel bolt pattern as I could be wrong.
Pick-ups are 5 on 5" and I think vans are 5 on 4-3/4"
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Old 02-03-2016, 03:18 PM   #12
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Re: 71 Stepvan gear change

It is in fact 5 4-3/4. I guess I'll just buy a carrier and gears since it's prolly easier and maybe cheaper than a trans swap. I got lucky with the van, came with a small Chevy pattern and discs up front.
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Old 02-03-2016, 03:21 PM   #13
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Re: 71 Stepvan gear change

More pics here
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Old 02-03-2016, 03:22 PM   #14
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Re: 71 Stepvan gear change

Our daughter loves it....no surprise.
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Old 02-03-2016, 03:42 PM   #15
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Re: 71 Stepvan gear change

Super cool P10! Did you check your bolt pattern? My '73 is 5x5.
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Old 02-03-2016, 10:02 PM   #16
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Re: 71 Stepvan gear change

I did not physically but that's what I read.
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