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Unread 04-22-2013, 08:00 AM   #1
magilla
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1969 C101 
 
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Manual Transmission for Buick 350?

What Manual transmissions/transfer cases came with the Jeep Gladiators 67-71 with the Buick 350?

Looking to get a Buick 350 for my '69 Jeepster Commando, and I want a 4-speed tranny...

Which manual trannies bolt to Buick 350, and what transfer cases did it come with?

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1969 Jeepster Commando w/Buick 231. T14/D20. D30/D44, 4.10 Locked/Spooled. 4x disc brakes, Saginaw PS. 32" x 9.5" Super Swampers.
1970 Jeepster Commando, in pieces. Buick 350 / SM 465 / D20.
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Unread 04-22-2013, 08:17 AM   #2
GeologyJeep
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The hardest part to find might be the flywheel for the 350 Buick engine. Years ago I swapped a 350 into a Jeep pickup and found that to be a rare item. Might now be available from modified (Hot Rod) sources. Check V8Buick forum. Mr. Ed
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Unread 04-22-2013, 04:17 PM   #3
jeepdaddy2000
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you may want to check the rear diff on the Commando. Many of them came with D30's in back, not a sturdy rear end behind a V8.
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Unread 04-22-2013, 05:20 PM   #4
magilla
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Thanks for the replies so far! Commando has a flanged D44 with G2 axles; Front is a Dana 30 with G2 axles. 4.10 gears and 32" x 9.5" tires.

My 225 is going downhill slowly, and needs a complete overhaul... Want to put in the Buick 350 to get some HP and TQ, but want to mate it to a 4-speed tranny instead of the T14 3-speed.

That's why I was looking at the 350/T18/D20 combo from the J trucks.

If someone can help me find this holy grail, I'd much appreciate it. I posted on the IFSJA board, but no response yet.
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1969 Jeepster Commando w/Buick 231. T14/D20. D30/D44, 4.10 Locked/Spooled. 4x disc brakes, Saginaw PS. 32" x 9.5" Super Swampers.
1970 Jeepster Commando, in pieces. Buick 350 / SM 465 / D20.
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Unread 04-23-2013, 08:30 PM   #5
1978jeep258
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I saw you post this on the JCCA. I was going to suggest the 350-T18-20 combo but it seems you've already considered that. Ten years ago I looked at a J-truck with that exact combo. The guy was selling it for like $500. It seemed like J-trucks and FSJ's were everywhere and cheap. Now, I can't remember the last time I saw one at the pic and pull.
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Unread 04-23-2013, 10:14 PM   #6
jeepdaddy2000
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You could do a rebuild on the 225. It is a torque monster and will put out good HP numbers with the typical big three upgrades.
It can be mated to a modified Ford T18 or you can get an adapter kit.
You also have the option of installing an SM transmission.
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Unread 04-27-2013, 04:20 PM   #7
timgr
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The T18-D20 combo from a J-truck or Wagoneer will be problematic in a C101. As well as being scarce, they either have a goofy long bellhousing and long input shaft, or a standard BOP bell and a 5" thick adapter, along with a 12-13" long input shaft. It's a very odd setup.

If you want, you can convert the Jeep T-18 to a short shaft (6" Ford T-18 input shaft kit, ca $200 from Parts Mike), and then use a regular BOP bell. IMO there's really no reason to seek out the 350-T18-D20 combo for this conversion, since you will have to convert it anyway. The only advantage will be that you can use the existing 225 frame towers for the 350.

The neat swap for a Buick 350 is in a TH400 equipped C101... but the 350 is too much motor for the 3-speed T-14 (the 225 is too much motor for the T-14, IMO).

If you want a truck 4-speed, any of the T18/NP435/SM420/SM465 will work if you are willing to buy an adapter kit. Read the Novak site. http://www.novak-adapt.com/ You can use a Buick 350 if you can find a flywheel. The small block Buicks 300/340/350 will drop on to the 225 mounts, but you'll have to move the radiator forward.

Personally I would go with a SBC and modify the mounts. Or keep the 225 ... they are fine motors. The Buick V8s are great motors, but there's no drop-in for these in the C101, except for the TH400 equipped cars.
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1) '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS, hubcaps. 2) '82 J20 360/T18/NP208/3.73, KOs, 7600 GVWR 3) '75 CJ-6, 304/T15, PS, BFG KM2s, soft top 4) '95 VW Golf Sport 2000cc 2D
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Unread 04-27-2013, 07:40 PM   #8
magilla
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Jeepdaddy and Tim - Thanks for the responses.

I believe that the Buick 350, although rarer, is a better motor for the application, lighter (125 lbs lighter than a sbc!), and produces good TQ. The aftermarket roller chain and external oil pump upgrades have solved most of the problems the Buick V8 ever had...

Besides - it is also a "Dauntless" motor.

Thanks for the info about the Gladiator combos. Looks like a 350/SM465/D20 or 350/T18a/D20 will be the ticket. Now to find a pesky 350 Buick flywheel...
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1969 Jeepster Commando w/Buick 231. T14/D20. D30/D44, 4.10 Locked/Spooled. 4x disc brakes, Saginaw PS. 32" x 9.5" Super Swampers.
1970 Jeepster Commando, in pieces. Buick 350 / SM 465 / D20.
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Unread 04-28-2013, 06:46 AM   #9
timgr
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True, the Buick is a great choice, if you can find one. They are light and they have a lot of torque for their displacement. But they will be harder to source than a SBC and they will be more expensive to rebuild or repair. Certainly the Buick outclasses the Gen I 350 Chevys from its era. However, I would guess that a Gen II with aluminum heads or the aluminum block Gen III will be as light or lighter than the Buick, and with its native EFI make as much power and torque as the 40 year old Buicks. With better economy.

But I'm with you if you want the Buick.
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1) '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS, hubcaps. 2) '82 J20 360/T18/NP208/3.73, KOs, 7600 GVWR 3) '75 CJ-6, 304/T15, PS, BFG KM2s, soft top 4) '95 VW Golf Sport 2000cc 2D
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