Hot Rods Big Daddy's 55 2 door wagon gasser

Mine is a cast iron case. 3.09-1st 1.67-2nd 1to1-3rd .73-4th

 

I’m not sure I would run it behind a big block, I have one in my barracuda but I would fear for its live behind a big block

 

thanks--looking at it it does look smaller/shorter-i think!

 

May I suggest a name? I am a huge fan of John Wayne and most oaters. War Wagon would please me.

 

That first gear is good with a 3.00 rear gear...but .73 4th equals to 2.19-1 final ratio. I think that's awfully tall for a car that'll probably have tallish tires and a carb. An rpm calculator puts 70 mph cruising rpm with a 30 inch tall tire and a 2.19 final rearend gear at about 1700 rpm. I'm sure you'll run taller than 30" tires..so rpm will be lower. Should be about 2200 rpm or so give or take to get out of the carbs primary circuits.

A friend of mine had a cool 68 Camaro with a 2.41 8.5" posi and a 700r4. He was able to run on the freeway in 4th gear at about 90 or so. He always complained about his gas mileage..

 

A833 transmissions came behind 6pk 440s and hemis. Just sayin.

 

Not a later overdrive one...probably pretty different internally and torque rating.

 

I thought they were still able to take a beating?

 

They are not as strong as the non overdrive 833s.

 

I'm running a 275-60. 28"tall. And I'm really good with running down the interstate at 80mph and 2000rpm.

 

Yeah I read something like 280ftlbs. But I've read a lot of other forums with guys running them behind their 406 sbc with 6" rods and aluminum heads. 4.10 gears, and love the overdrive. So I don't know. Durability testing should sort out the issues. Long way to go

 

Hey you taught me the meaning of KTBF, that'll factor into durability testing.
Looking forward to the ''voyage home'' pics!

 

Sounds good..a big block will pull it around no problem. The shorter tire size makes a big difference in cruise rpm. Never really looked into that trans...seems pretty cool.

 

Ha, NO. I had mine done about 5 years ago, prices I am sure were lower then now. But, I decided to do the entire rear with all FabCrafts best stuff. Once and done. Dave made the axles, hell the whole damn thing, he told me 1000 hp would most likely never break it. I was broke the rest of that winter.

 

Hey Lloyd....or anyone else who knows. That later model NP trans has me really intrigued. Really seems like a great trans for a street car if you have normal size rear tires 26"-27.5" or so. Keep the rpms near 2k at 70. I've known about them but never paid attention. What year trucks did they come out of? V8 full size no doubt right? I'd like to see a picture of the corresponding bellhousing without the trans mounted to see what that bolt pattern looks like. Lastly the best part to me is that I've probably walked by 100s of those over the years at swaps here as they aren't musclecar period restoration transmissions and are really generic truck parts. I'm sure out here at Socal swaps they can be had cheap. Cheap overdrive! 280 ft lbs is plenty strong for a daily driver hot rod...good stuff.

 

I would love to get a hold of that 64 Valiant wagon on the right.

 

There's a 61 on marketplace, I was going to buy one for my ex (when she wasn't the ex yet) but she didn't like it.

 

They came in a MOPAR and Chevy version, MOPAR version was cars and maybe trucks, Chevy trucks only.

 

According to my slim knowledge, 81-87 Chevy C10 trucks. You can Google NP833 and find lots on info and pictures. There's some interesting stuff on them. If you notice, the shift lever is upside down on 3-4. They were trying to improve gas mileage, so the replaced 3rd gear with a .73 OD, flipped the lever, now 4th gear, which was 1-1, is now 3rd, and 3rd, well, you get the point. There are guys on the internet that love them. But of course, John force says they won't hold up to nothing and you're wasting your money. Well, I wasted $450. Not as cheap as the T10 Jed gave me, but it's close lol

 

Shoot, I’d use that OD transmission in a heartbeat. I’ve seen what abuse they can take in a farm truck. Go for it.

 

I’ll volunteer my services for the endurance testing, and free of charge seeing how you’re on budget. LOL
Dan

 

The overdrive 833s were used in Chrysler cars and trucks, mine was behind a slant six, they did come behind 318s as well. Nothing bigger than that to the best of my knowledge, that should tell you something….yes Chevy used them in pickups as well.

 

A center section with a posi unit and your choice of gear is $2500... I guess for a strip car, that's OK. But most people around here would use a 9". Hell the 8.8 was free lmao

 

That is soooo ugly, that it is beautiful ..

 

Right, kinda like my Henry J, I like the quirky cars, indestructible leaning tower of power in it, first thing to go would be those bumper guards ... yuuuk !

 

For whatever its worth, the OD 833's weak point was the aluminum case. It is said that under sever pounding, the gear shafts would pound out the holes in the case and allow the gears to walk under load. I pounded the daylights out of a few of those aluminum case OD transmissions for several years and never had a problem, but sticky tires were not involved.

The only difference between the aluminum OD 833 and the performance era Mopar 833 was 3rd gear was replaced with the OD gear and the cast iron case was exchanged for an aluminum case. One big point is the standard cast case 833 was only used behind the Mopar big block 383 and the later big block 400. The Hemi and 440 motors used the Hemi 833 which had a larger input shaft and 1st & 2nd gears.

The Chevy 833 OD truck trans was the 383 Mopar trans with 3rd gear swapped out for the OD gear. If you have an early Chevy Cast OD 833, its going to hold up pretty well behind your BBC, as long as your not bolting slicks on it.

The aluminum 833 OD was used behind the Mopar 360s, 318s, and slant 6s because those were the only motors Chrysler had during the aluminum case OD use.

Of course, your experience may be different then mine was.

 

This transmission is a cast iron case. I've read that they did that behind the 6.2 diesel, but not confirmed. My chief had a diesel truck with an aluminum NP833

 

I would be more concerned about the aluminum bell housing.

 

Chrysler had aluminum and cast case overdrives, mine is cast iron.

 

The farm truck abuse I referred to involved a 1983 GMC with a 6.2 diesel pulling two fully loaded John Deere hay wagons and a bunch of farm hands who didn’t give a **** about the equipment. This occurred all summer long for the two years I worked there. That poor GMC was still running and driving when they traded it in on a 3500 dually with a 454/SM465. I suspect on Lloyd’s wagon, there won’t be enough traction to hurt the transmission.