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05-26-2015, 11:38 AM | #1 |
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Join Date: Dec 2014
Location: Chippewa Falls, WI
Posts: 41
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2 speed rear diaphram needed
Well, I took the Skewlie to Viroqua, WI. for the holiday weekend. One of the first things I did was get her stuck. D'OH! I had to wait until the next day for a 4-wheel drive tractor to give me a tug out. 2 truck hooked up at once couldn't budge it. Had to do a little re-sodding afterwords too. My bad! If it wasn't for the extra platform for the LP tank and generator, I probably would've made it. Nobody would pull me out until they got all their pictures in either. How embarrassing! We all had a good chuckle over it though.
It ran good on the way there after my carb rebuild last Wednesday. A bit more power and better mileage. But on the way home, I started losing vacuum and the two speed rear wouldn't shift into high. After some rolling around under it in a grocery store parking lot in Westby for a while, I finally traced the leak down to the diaphragm in the two speed vacuum cylinder. It took me a while to get things degrease and cleaned up enough to get some duct tape to stick, but it got me home without failing again. I managed to find a couple part numbers to get a replacement. So far, I'm coming up with GM P/N: 3847058, and Bendix P/N: 374451. I found one on eBay for $35.00. I still have to get some plugs, wires, cap & rotor and see if the distributor is working properly after sitting for so long. I almost had some the other day, but the kid behind the counter decided he was gonna be smart and talk down to me. So I just ended up walking out with nothing after telling him he needed to go back to school. Even with getting that old 327 running better, it still isn't very well suited to be pulling a 30 foot bus around. I'm seriously considering selling it to finance an engine upgrade that would fit the bill a bit better. Somewhere in the neighborhood of a 454 and a 5 speed transmission. I'm figuring that even with the bigger engine, it would be working less, and get better mileage. Heck, even if it got the same mileage, I'd be happy with better highway speeds and being able to sustain speed up the hills. I would like to pull my 65 Baja Bug with me once in a while too. Just pulling my bike seems to be a drag. L8rs! Bill |
05-26-2015, 02:37 PM | #2 |
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Join Date: Dec 2014
Location: Chippewa Falls, WI
Posts: 41
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Re: 2 speed rear diaphram needed
Well, these part numbers aren't helping any. The Bendix P/N appears to be obsolete, the GM P/N isn't crossing to anything helpful. Does anybody have any updated part numbers?
Thanks, Bill |
05-26-2015, 04:10 PM | #3 |
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Join Date: Jul 2011
Location: WV
Posts: 946
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Re: 2 speed rear diaphram needed
I would look into changing it to electric. Pretty sure my 70 is electric as was my 59 10400.
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72 GMC C2500 402/Th400 first truck (still have) 77 GMC C3500 CC dually Sold 70 C50 dump truck "Rusty" 87 K10 Suburban Sold 93 K2500 xcab 6.5TD 96 GMC K2500 Suburban 6.5 TD |
05-26-2015, 04:13 PM | #4 |
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Join Date: Dec 2014
Location: Chippewa Falls, WI
Posts: 41
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Re: 2 speed rear diaphram needed
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05-26-2015, 04:16 PM | #5 | |
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Join Date: Nov 2001
Location: Moneta, VA USA
Posts: 3,088
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Re: 2 speed rear diaphram needed
Quote:
Bill
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'60-'72 Chev/GMC Fan GMC 9500 Fan Detroit Diesel Fan |
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05-26-2015, 08:24 PM | #6 |
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Join Date: Dec 2014
Location: Flat Rock Michigan
Posts: 76
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Re: 2 speed rear diaphram needed
Have any fleetpride part distributors around you, if so they may be able to get your parts.
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1968 GMC 1 ton 4*4 with Detroit Diesel 6v53t 9ft stepside 1978 Chevrolet C50 350sb 8ft fleetside |
05-27-2015, 10:29 AM | #7 | |
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Join Date: Dec 2014
Location: Chippewa Falls, WI
Posts: 41
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Re: 2 speed rear diaphram needed
Quote:
Slowly but surely, I'm getting this thing squared away. Bill. |
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05-29-2015, 02:22 PM | #8 |
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Join Date: Mar 2003
Location: Colfax-California
Posts: 8,641
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Re: 2 speed rear diaphram needed
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06-16-2015, 04:05 PM | #9 |
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Join Date: Dec 2014
Location: Chippewa Falls, WI
Posts: 41
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Re: 2 speed rear diaphram needed
Well, I did manage to get one off of eBay for $35.00. Fit perfectly.
He had these P/N's listed: GM#3847058 and BENDIX#374451 Neither of which helped with finding it locally. Now it time to pick up the new vacuum advance, cap, rotor, plugs and wires, and an oil change. That should pep her up a bit, seeing as how the vacuum advance on the distributor wasn't working at all and leaking vacuum. Bill |
06-18-2015, 12:46 AM | #10 |
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Join Date: Jul 2011
Location: WV
Posts: 946
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Re: 2 speed rear diaphram needed
Well at least the vacuum advance will be easier to get..... Might look into an HEI too. Reliable and an easy mod. Only have to change one wire.
__________________
72 GMC C2500 402/Th400 first truck (still have) 77 GMC C3500 CC dually Sold 70 C50 dump truck "Rusty" 87 K10 Suburban Sold 93 K2500 xcab 6.5TD 96 GMC K2500 Suburban 6.5 TD |
06-18-2015, 02:09 PM | #11 | |
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Join Date: Dec 2014
Location: Chippewa Falls, WI
Posts: 41
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Re: 2 speed rear diaphram needed
Quote:
Bill |
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