MB T-Case with overdrive

1941 - 1945, Willys MB & Ford GPW jeeps, NO EBAY, Craigslist or COMMERCIAL SALES.
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Bart1015
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MB T-Case with overdrive

Post by Bart1015 » Mon Mar 30, 2020 1:50 pm

Hello all,

I have a MB transfer case with a Borg-Warner overdrive installed.

This was taken off a running, working jeep several years ago and my plan was to reseal the transfer case and install it on an MB that I have since sold.

The internals of the transfer case look good, everything turns smoothly and there is still gear oil inside. I have kept it protected and stored in my shop and there should be no surprises with this unit.

It will come with a speedometer cable, on/off cable and a custom-made driveline to install this in a GPW/MB.

These units are unique because, when turned on, they automatically kick in. You will not have to cut any holes for the shift levers or make any linkage.

Herm the overdrive guy stocks all parts for these units.

http://hermtheoverdriveguy.com/borg-warner-overdrives

I would like to get $450 or best offer for the tcase and overdrive combo. If you’re at all interested, send me an offer.

Ideally, local pickup would be best. I live in Sonoma County, Ca.

Thanks,

Brett
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1942 VEP GPW, J-2 winch, BC-659, 1919a4
1945 GPW, 1943 MBT
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JAB
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Re: MB T-Case with overdrive

Post by JAB » Tue Mar 31, 2020 4:55 am

I fit doesn't sell here on the Gee I bet you'd get a lot of interest here: https://www.oldwillysforum.com/forum/index.php
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gpwmke
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Re: MB T-Case with overdrive

Post by gpwmke » Tue Mar 31, 2020 1:53 pm

No expert on overdrives but what brand is this? Is this set up so that the overdrive will only work in 2 wheel drive hi range? Only on the rear drive shaft? I have never seen an overdrive like this. I thought the Warn/Sun brand overdrive were mounted where the access cover is on the transfer case not where the parking brake is usually mounted?

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Re: MB T-Case with overdrive

Post by savmag » Wed Apr 01, 2020 2:22 am

This seems like an overdrive from a T86 or T96 which was fitted on many civilian cars in the 50s. This unit seems to bolt on the transfer case via an adapter plate.

I am curious to see the output shaft configuration used on this unit as I am not aware of extended (long) Dana 18 output shafts. The one thing I am not so sure about is the amount of strain that the overdrive unit will put on the rear four transfer case bolts. Any vehicle will definitely need a rear support for the overdrive.

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Re: MB T-Case with overdrive

Post by Bart1015 » Wed Apr 01, 2020 8:15 am

gpwmke wrote:
Tue Mar 31, 2020 1:53 pm
No expert on overdrives but what brand is this? Is this set up so that the overdrive will only work in 2 wheel drive hi range? Only on the rear drive shaft? I have never seen an overdrive like this. I thought the Warn/Sun brand overdrive were mounted where the access cover is on the transfer case not where the parking brake is usually mounted?
Its a Borg-Warner overdrive. Your are correct, it will only work in 2WD and it mounts differently than the Warn units. In the original posting there is a weblink that has more information about them.

Brett
1942 VEP GPW, J-2 winch, BC-659, 1919a4
1945 GPW, 1943 MBT
Sold - 1967 M151a1, 1943 MB, M416
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Re: MB T-Case with overdrive

Post by Bart1015 » Wed Apr 01, 2020 8:24 am

savmag wrote:
Wed Apr 01, 2020 2:22 am
This seems like an overdrive from a T86 or T96 which was fitted on many civilian cars in the 50s. This unit seems to bolt on the transfer case via an adapter plate.

I am curious to see the output shaft configuration used on this unit as I am not aware of extended (long) Dana 18 output shafts. The one thing I am not so sure about is the amount of strain that the overdrive unit will put on the rear four transfer case bolts. Any vehicle will definitely need a rear support for the overdrive.
I have several people interested in the unit and whoever buys it may not want the T/C. If I end up splitting them, Ill let you know the configuration. I believe the unit does NOT require a longer T/C output shaft. I think the O/D has an inlet shaft that slips over the Dana 18 output shaft.

Please check out the link that was in the original post. These units are in common use with 2wd vehicle along with other vehicles using the Dana 18 T/C and adding extra supports ect is not necessary. This is the reason why I had intended to use this on my MB. No cutting, no linkages, no other major modifications other than a shorter rear driveline, of which is included with unit.

Brett
1942 VEP GPW, J-2 winch, BC-659, 1919a4
1945 GPW, 1943 MBT
Sold - 1967 M151a1, 1943 MB, M416
www.ToThePointPolygraph.com

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Re: MB T-Case with overdrive

Post by hummermark » Wed Apr 01, 2020 1:11 pm

Interesting what happens to the emergency brake drum ?
Do you know what voltage solenoid is fitted as looking in the link you posted they are pricey at $330 each
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Re: MB T-Case with overdrive

Post by savmag » Wed Apr 01, 2020 1:38 pm

I hope that inlet shaft is a slip-on type, otherwise it will be much more complicated to remove the overdrive. If the shaft is a longer type, you will need to remove the various linkages, relays and solenoid first before separating it from the T/C. The planetaries along with the roller bearings will have to be dropped first and then the unit separated. The first time I read a Studebaker Champion manual (these cars were equipped with these units) my final assessment was that the overdrive was the most complicated piece of machinery installed on the car. :D

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Re: MB T-Case with overdrive

Post by gpwmke » Wed Apr 01, 2020 4:05 pm

Since the overdrive would only be on the rear drive shaft, wouldn't it be prudent to not hook up the front drive shaft? If you ran this set up and accidently shifted into 4 wheel drive, there would be some serious problems.

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Re: MB T-Case with overdrive

Post by Bart1015 » Wed Apr 01, 2020 4:34 pm

gpwmke wrote:
Wed Apr 01, 2020 4:05 pm
Since the overdrive would only be on the rear drive shaft, wouldn't it be prudent to not hook up the front drive shaft? If you ran this set up and accidently shifted into 4 wheel drive, there would be some serious problems.
I have never accidentally shifted into 4wd, but I guess you could remove the driveline or simply install locking hubs on the front axel.

As long as the unit is turned off you could use 4wd without any issues at all.

Brett
Last edited by Bart1015 on Wed Apr 01, 2020 4:41 pm, edited 1 time in total.
1942 VEP GPW, J-2 winch, BC-659, 1919a4
1945 GPW, 1943 MBT
Sold - 1967 M151a1, 1943 MB, M416
www.ToThePointPolygraph.com

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Re: MB T-Case with overdrive

Post by Bart1015 » Wed Apr 01, 2020 4:39 pm

IMG_3608.jpg
[/quote]

I hope that inlet shaft is a slip-on type, otherwise it will be much more complicated to remove the overdrive. If the shaft is a longer type, you will need to remove the various linkages, relays and solenoid first before separating it from the T/C. The planetaries along with the roller bearings will have to be dropped first and then the unit separated. The first time I read a Studebaker Champion manual (these cars were equipped with these units) my final assessment was that the overdrive was the most complicated piece of machinery installed on the car. :D
[/quote]

I just removed the OD. It uses a completely different TC output shaft that is about 8 inches longer than the normal one. It was order to remove the output shaft from the TC then removing the OD. I was just carful and went slow. The new owner will have the complete unit, including the TC output shaft.
1942 VEP GPW, J-2 winch, BC-659, 1919a4
1945 GPW, 1943 MBT
Sold - 1967 M151a1, 1943 MB, M416
www.ToThePointPolygraph.com

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Re: MB T-Case with overdrive

Post by gpwmke » Wed Apr 01, 2020 7:41 pm

I am thinking that is not the standard output shaft used on the MB/GPW transfer case. Interesting that it would work in the MB/GPW transfer case. This setup would definitely give you faster road speed at lower engine rpm.

savmag
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Re: MB T-Case with overdrive

Post by savmag » Thu Apr 02, 2020 5:03 am

Bart1015 wrote:
Wed Apr 01, 2020 4:39 pm
IMG_3608.jpg
I hope that inlet shaft is a slip-on type, otherwise it will be much more complicated to remove the overdrive. If the shaft is a longer type, you will need to remove the various linkages, relays and solenoid first before separating it from the T/C. The planetaries along with the roller bearings will have to be dropped first and then the unit separated. The first time I read a Studebaker Champion manual (these cars were equipped with these units) my final assessment was that the overdrive was the most complicated piece of machinery installed on the car. :D
[/quote]

I just removed the OD. It uses a completely different TC output shaft that is about 8 inches longer than the normal one. It was order to remove the output shaft from the TC then removing the OD. I was just carful and went slow. The new owner will have the complete unit, including the TC output shaft.
[/quote]

Thanks for the follow up Brett. Very interesting setup.

Brgds
Savvas

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Re: MB T-Case with overdrive

Post by John Neuenburg » Sat Apr 04, 2020 1:45 pm

It would be cool to hide the solenoid switch. Use the panel lights switch?
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Re: MB T-Case with overdrive

Post by Bob Bell » Tue Apr 14, 2020 10:57 am

I used to have one of these overdrives on a Willys panel wagon. I also had the Warn overdrive on my CJ2A. After a beer or two I would sometimes consider putting the panel wagon overdrive onto my jeep in addition to the Warn o/d. Figured I would call the entire set-up Hyperdrive. Never did it due to the fact that it would pretty much screw up the 4wd, but it was a nice fantasy.
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Have owned dozens of flat fenders over the years including 1945 CJ2A 10011 which I sold in 2002.
First 4WD was an Austin Champ in 1965, and then a GPW UK license number HRO 443, sold in 1974.

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