Did you ever find out if there is an Allison with overdrive that does not require a computer? I want to put and OD transmission in my 87 Motorhome. I know old school bus Allisons can be had for a few hundred $$. But I can't find a model number to look for.
Hi skid4u. I've got an '06 LBZ build Duramax/Allison. Somebody will know this better ... but I have heard that any year edition of the Allison is the same -- and intended for use across the spectrum from my 3/4-ton truck to commercial size vehicles. Allisons have a solid reputation and I'm not sure exactly where the current smart control lies - computer, Allison grade braking, etc.
Somebody might be able to tell you better what year/series would work with your situation.
Hi,94 A/s Classic uses MD 3060 6spd.w/ 5& 6th od,20000 GVW.Results in 1900rpm @60 mph.Yes it uses a computer & touch pad ,that works very well. Good luck with your project. Phil&Sandy Christmas Valley Oregon
I would contact an Commercial Allison shop and ask them. Allison made transmissions long before computers. Most truck transmissions have the same bolt pattern to the engine.
An important question is does the converter lock and can it be locked in other than OD. The ability to lock the converter in a lower gear on long hills is the greatest thing since sliced bread.
If I had not had that ability I would have lost the trans on one hill in Labrador. Climbed like a champ at 35 mph locked in second gear.
Last information I have gotten is that Allison transmissions do not get the RPM signal from the engine. It comes from the transmission itself, therefore being self contained with a TCM,transmission control module, to control shifting. This module can be adjusted on the fly with some models ( as Diesel Phil)and all can be programmed, just not sure how yet. I know Allison dealers could do it. I will continue looking.
The TCM is a stand alone controller for the Allison tranny. The 1000 series has the lock up torque converter and overdrive and came along about 1999 or 2000. If you can get the serial number of a particular transmission you find it can be plugged in at Allison's website and will tell you what transmission it is and the specific options it has such as retarder, torque converter stall, etc. The overdrive ratio for the 1000 is .74.
Godspeed,
Trent
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TV1: Black Sheep, 2001 Dodge 3500, 800,xxx miles,a few non-stock parts here and there...
TV2: Brownie, 1989 Dodge W250, only 253,000 miles!
As great a solution as this sounds we do have to note that Skid is talking about a gas engined 454 chevy not a diesel.
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Glen Coombe AIR #8416
1984 28' Funeral Coach
Golf Professional Sales Rolling Showroom & PuttLab
"I'm not an expert. But I did sleep in an Airstream last night."
I just completed changing the rear end ratio in our 345 from 4:56 to 4:10. It had a dramatic effect on the rpm's and seems like it had little or no effect on power. It made about a ten per cent difference in the rpm's to mph.
Rebuilding the rear end was done at Zumbrota Gear in Zumbrota, Minnesota. I sent them the complete driver axle minus the wheels. The cost from them was $880.00. I also retained the old ring and pinion just in case I need it in the future. They guarantee their work for one year.
The first time I drove it I was amazed! Low gear was too low in my opinion. It seems to fly now. Love it!
By the way, our 1985 345 diesel has a non computerized Allison 4 spd trans. Works great.
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AKA THE GUNNER There is no "I" in the word "team," but there are four in "Platitude Quoting Idiot!"
I just completed changing the rear end ratio in our 345 from 4:56 to 4:10. It had a dramatic effect on the rpm's and seems like it had little or no effect on power. It made about a ten per cent difference in the rpm's to mph.
Rebuilding the rear end was done at Zumbrota Gear in Zumbrota, Minnesota. I sent them the complete driver axle minus the wheels. The cost from them was $880.00. I also retained the old ring and pinion just in case I need it in the future. They guarantee their work for one year.
The first time I drove it I was amazed! Low gear was too low in my opinion. It seems to fly now. Love it!
By the way, our 1985 345 diesel has a non computerized Allison 4 spd trans. Works great.
Coop, are you telling us that you extracted the whole drive axle and sent it to them? Why not just take the unit in? I would have thought doing it in place would have been better to shim and such. Interesting that they are offering a full warranty on your re-install.
BTW did you refill with a synthetic lube?
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Glen Coombe AIR #8416
1984 28' Funeral Coach
Golf Professional Sales Rolling Showroom & PuttLab
"I'm not an expert. But I did sleep in an Airstream last night."
Coop, are you telling us that you extracted the whole drive axle and sent it to them? Why not just take the unit in? I would have thought doing it in place would have been better to shim and such. Interesting that they are offering a full warranty on your re-install.
BTW did you refill with a synthetic lube?
They do not have a shop large enough to house a motorhome. They primarily rebuild rear ends and they do a lot of them. I have a farmer neighbor who has a large shop and we removed the axle assembly and we hauled it down in a pickup. They need the full assembly in order to shim it properly.
Yep, full warranty.
Yep, synthetic lube.
While we were at it Glenn we also replaced as needed two inner wheel bearings, two of the rotors, two calipers, two wheel seals, two brake lines, brake pads, rubber brake lines, and one u-joint.
We also went through all the other wheels and packed the bearings and replaced rotors and pads where needed.
Total parts, $1656.00
Runs like new.
Still to do this Winter, replace thermostat and flush radiator, adjust valves on engine.
The unit has about 140,000 miles on it now. Nicely broke in.
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AKA THE GUNNER There is no "I" in the word "team," but there are four in "Platitude Quoting Idiot!"
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