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Author Topic: Thinking about swapping out for a 8v71 and a 4speed....Thoughts  (Read 2284 times)
John316
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MCI 1995 DL3, DD S60, Allison B500.




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« on: April 01, 2013, 04:45:10 AM »

Not much else to add? Found a deal on 8v71 and a four speed. The tranny is supposedly in good shape, but the 8v71 would have to be rebuilt (came out of an old truck).

That would give us an opportunity to get rid of all of the electronics on our current S60 and b500 tranny. At that point we might look into running unfiltered straight veggie oil in in and used motor oil. Could save us a bundle on fuel.

Anything else we should consider?

Oh yes, I would consider putting Google Nose on it eventually http://www.google.com/landing/nose/ Might be pretty cool.

John
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MCI 1995 DL3. DD S60 with a Allison B500.
TedCalvert
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« Reply #1 on: April 01, 2013, 04:50:43 AM »

Nice day today, isn't it?  The 1st. of April!
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muldoonman
1991 Prevost 8V92TA
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« Reply #2 on: April 01, 2013, 05:23:55 AM »

Are the 8v71's and 8v92's much difference in size and weight?  If you gonna take that 60 out go with the gusto!
« Last Edit: April 01, 2013, 07:43:25 AM by muldoonman » Logged
robertglines1
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« Reply #3 on: April 01, 2013, 06:18:09 AM »

Wing to help traction! With all that extra power and low gear it would be a wheel spinner. Bob
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Bob@Judy  98 XLE prevost with 3 slides --Home done---last one! SW INdiana
chessie4905
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« Reply #4 on: April 01, 2013, 06:28:18 AM »

obviously, you have too much free time on your hands....go wax your coach.
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GMC h8h 649#028
Pennsylvania-central
John316
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MCI 1995 DL3, DD S60, Allison B500.




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« Reply #5 on: April 01, 2013, 06:38:32 AM »

Actually, may not need to be rebuilt. Looks pretty good.
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MCI 1995 DL3. DD S60 with a Allison B500.
rv_safetyman
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Jim Shepherd


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« Reply #6 on: April 01, 2013, 06:44:09 AM »

 Grin
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Jim Shepherd
Evergreen, CO
85 Eagle 10/Series 60/Eaton AutoShift 10 speed transmission
Somewhere between a tin tent and a finished product
Bus Project details: http://beltguy.com/Bus_Project/busproject.htm
Blog:  http://rvsafetyman.blogspot.com/
Oonrahnjay
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« Reply #7 on: April 01, 2013, 06:58:13 AM »

  Actually, may not need to be rebuilt. Looks pretty good. 

    Just "minor finish issues" -- that'll buff out!
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Bruce H; Wallace (near Wilmington) NC
1976 Daimler (British) Double-Decker Bus; 34' long
6-cyl, 4-stroke, Leyland O-680 engine

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muldoonman
1991 Prevost 8V92TA
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« Reply #8 on: April 01, 2013, 07:10:19 AM »

I have a set of slicks for that puppy when you make the change. You'll need um when you drop the proverbial Hammer!
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John316
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MCI 1995 DL3, DD S60, Allison B500.




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« Reply #9 on: April 01, 2013, 07:22:20 AM »

Good points and thoughts all around. Bob, I like the wing idea. Probably be needed. Muld, let me know when I can come pickup your slicks, will need those for sure.

Thinking of painting it before install.....thinking silver.
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MCI 1995 DL3. DD S60 with a Allison B500.
TomC
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« Reply #10 on: April 01, 2013, 07:54:28 AM »

Put a good paint job on it and it should run just fine. Obviously this is from a GMC Astro since it has a GM air conditioning compressor on it and the low profile turbocharger. 8V-92 and 8V-71 are the same block and head external size. The only difference is the 8V-92 has a large vibration dampner on the front of the crankshaft (like a small flywheel) that keeps it from easily being installed in a V drive.

Yes changing to the 8V-71 will be one way of having a mechanical engine. It will also be a way to loose 2 or more mpg and about half the torque. If you change it out, let us know-we'll take you directly to the looney farm-and this from a person that has his birthday today. Good Luck, TomC
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Tom & Donna Christman. '77 AMGeneral 10240B; 8V-71TATAIC V730.
FloridaCliff
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« Reply #11 on: April 01, 2013, 08:29:54 AM »

John,

Why not come down to Florida and we can exchange our engine and trannies?

I know a lot of nay sayer's say you can't put a straight engine in a V-drive like my 4905, but I think I have it figured out for both of us

Since I am only 96" wide, I can modify the tranny service door to let it hang out a few feet.

Only folks who might complain are bicycle riders in the share lane, but I doubt they will make it to a phone... Tongue

Happy Birthday Tom.

Cliff
« Last Edit: April 01, 2013, 10:07:49 AM by FloridaCliff » Logged

1975 GMC  P8M4905A-1160    North Central Florida

"There are basically two types of people. People who accomplish things, and people who claim to have accomplished things. The first group is less crowded."
Mark Twain
Len Silva
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« Reply #12 on: April 01, 2013, 09:23:28 AM »

I think it's a great idea and that you should go for it.  But do it today, cause tomorrow it will be a stupid idea.
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Hand Made Gifts

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morefire
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« Reply #13 on: April 01, 2013, 01:29:19 PM »

LOL  Love it!!   Nicely played OP Grin
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David G
Toronto, Ontario
2009 Bluebird 40' Coach
Cummins ISX-675HP!!
chessie4905
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« Reply #14 on: April 01, 2013, 03:22:11 PM »

That small ac compressor also means it might have come out of a GMC pickup. I think GEO Metros also used that combo with a larger turbo.
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GMC h8h 649#028
Pennsylvania-central
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