Kinda missing the whole picture regarding the Gear Vendors Over/Under. It is not only a overdrive but also turns a 727 into a six speed. Mount a simple button on the shifter and it allows you to split gears. 1st , 1st over, 2, 2nd over etc. Works great. Put it in my 70 Challenger RT/SE.

I believe you missed one a833 overdrive transmission that came from mid 70's mopar truck or van. That came with a cast iron main case. I had a van that had one, and now its in my 69 R/T SE.

John Cope builds 518s and 727s. You can get both with a lock torque converter. He also sells a kit to bolt a 518 to a big block with no cutting of the bell housing.

I really like the gear vendors unit, put it on a short 727 and the length isn't too bad. Nice overview video

One I think most people miss is the GM 4L80E. Its common, you can pick one up from a wrecked truck or van for a few hundred dollars. And then spend around $800 to buy a mcleod performance rebuild kit and a couple of stronger internal parts and that will give you a transmission capable of handling over 800hp for about a 3rd of what most of these aftermarket boxes cost to convert to.

Thankyou for your information, it is great appreciated

Nice information !! thank you.

Very nicely done and great info. As of late, I have been considering a build of a slant 6 early A-body with at least 300 HP (torque maybe 280 up?) just as a unique challenge. I guess the 4-speed OD (or what some call the 3-speed OD) appears to be a 833 with the < 1:1 4th gear (you covered this here). Any idea what these 3-speed or 4-speed units can handle in terms of torque output? What I don't know very well are what manual options could displace a true 3-speed or this 4-speed should I need to go beefier due to torque (Say T-5, T-10, Top Loader although these are not necessarily beefier). This would be bolted to a stock bellhousing for the slant 6 or the strongest I can find. I could potentially run an automatic since this will likely see more drag strip use. I guess these automatics were 904's that can be built pretty beefy but assume this is an uncommon bellhousing pattern to other Mopar engines--right? Assuming this is unique have you heard of any available adapters to Mopar V-8 patterns or even GM pattern for say any of these choices? Do note, I'm not really too concerned about overdrive ratios in my questions... Thanks and sorry for all the questions. I couldn't find a definitive source elsewhere.

I was hoping there is an updated video. I have a 70 Plymouth RR and I want to replace the 727 with an overdrive gear. I have a 440 so it doesnt like going on the expressway at 80. If someone has any options, I am all ears. Thanks

( I know this isn't mopar) I've got a very rare 1995 F250 with the C6 three speed (no overdrive) I tried to get a E4OD installed but the shop said it would be too much work, requiring the cab to come off. The gear vendors is nice but it seems to be expensive and the lack of locking up the converter still sort of shoots you in the foot. I want to go from 3k to 2k rpm on the highway instead of paying around $4k to get the gear vendor for around 500 rpm. Anybody out there who's dealt with the C6? I'd also like to drop from 3.55 rear gears to 3.08, but it seems they are no longer available for the 10.25 rear ends. It wouldn't be so bad if I could regear the C6 to have third gear be an overdrive or even a lockup converter option but there doesn't seem to be a way to have it any different than 1:1 ratio in third gear with no lockup.

Great video, I guess it was made before Tremecs new, small TKX 5spd. I have one on order for my Cuda.

Any thoughts on the new Tremec TKX 5 speed? Looks like a direct bolt in without floor mods or crossmember notching

whats up with A500 (42rh) OD+Lock Up.........A518 Is OD only

Whats the best stock manual trans for my 91 ramcharger 318 v8. Please and thank you!

Hey boss ! Just got a 67 Camaro with a Muncie M2 (i believe still looking thu all the details. ). My 1 st gear is waaaaay to high (Feels like I’m pulling out of 2nd or 3rd ) The other gears are fine I looked at Gear Vendors but that doesn’t help my situation. If I put in taller gears in the rear that fixes first. But then I lose the ability to dive the highway to whatever degree. Suggestions ?

Hello I have 73 charger with 3 on the tree and I want to go automatic can you tell me the best bang for my buck (I’m not a rich man )