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I got you, I'm not an expert either but from what I do know... The engine RPM won't increase above stall when the car is stopped but the slippage doesn't disappear once the car is moving. The slippage is still there all the way to redline which is why drag racers sometimes use slippage...

The slippage from a torque converter gets pretty complicated (or I guess, more complicated) when the output side is spinning. The stall speed indicates the max RPM difference between the input and output when the output is stopped but that doesn't mean there isn't still slippage between the two...

I'm not trying to disagree with you and am seriously considering swapping in the AX-15 I have sitting on my garage floor out of my old Jeep XJ, but... the key factor I think you're missing is the torque converter. Even a stock converter allows for 1000 RPM or more of slippage when the engine is...

@75slant6 swapped an AX-15 into his Duster, he should know what you need. It's probably also outlined in his build thread in the Member's Restoration sub-forum.

Another vote for MT-90, while I haven't run it in an A-833 I did run it for years in the AX-15 5-speed in my Jeep and it made a big difference in shift feel and effort the first time I put that fluid in it (had 180k miles when I first got it and I put another 80k on it myself, never rebuilt)...

That's my understanding as well based off the installation instructions for a TKO in an A-body and that's basically the same size as the TKX. TKO only requires the tunnel to be sliced and "expanded" in a few areas while looking at @goldduster318 's build thread the T-56 requires pretty much an...

1st gear times axle ratio, sometimes you gotta play with both to get the right ratio. In the Mopar Chassis manual it's just called "starting ratio". Also in that book it talks about how auto-trans cars don't need as much gear because of the torque converter so general rule of thumb is 1st gear...

TKO instructions. 6060 is bigger https://shiftsst.com/pub/media/wysiwyg/pdfs/2019June/MAM-00751_MOPAR_A-BODY_TKO_Installation_Manual_Rev0.pdf Just read through this, I like the method they use really not much metal removal just some "stretching" of the tunnel. Hard to tell from pics but...

SST said it was bigger than yhe T5, and by their account, the T5 still needed tunnel love for a mopar a body. Yes but how much? Seems like for a T-56 you have to remove half the entire trans tunnel to make it fit...

I was planning to go that route using a T-56 out of a wrecked Challenger until I saw this video... seems like more hassle than it's worth and probably not as much money saved as might be thought. The different bellhousing and input shaft wouldn't be needed but still need to figure out the...

Same here, if this doesn't require me to cut multiple square feet out of my floor I'd rather go with the TKX. Based on the video it looks like it shares a lot of major features/dimensions with the TKO, it's just slimmed down. I'd imagine it shouldn't take much to modify the currently-available...

Looks like it's based on the GM 4L60, good choice and wayyy better than a 46RH/RE or A-518 sorry/not sorry to say. That price seems pretty typical for modern-trans-to-classic-car conversion kits, looks good to me...

LOL my car is already wayyy past "go back to bone stock in an afternoon". But if it was an original 340 4-speed car it would be a completely different story.

Even now it's getting harder to find LA engines anymore that don't need a full rebuild, I've "moved on" to Magnums since they're the most economical way to re-power an old Mopar. I can definitely see G3 Hemi swaps becoming more popular over the next decade. BTW after doing a bunch of research...

I had wanted to do this swap for a long time but can't see myself swinging that kind of money for a transmission, a 5-speed no doubt when 6-speed Tremecs are readily available. IMO the only real benefits are not having to cut the floor and a transmission that looks factory (aside from that big...

Lol probably gonna have to start drinking a lot more free beer if you want one in this lifetime

yellow rose: you mean the discoloring towards the tail-end of the shaft? I have noticed in removing the gears from the main shaft that there is a bit of a gray pasty stuff inside (between gear bushing and main shaft surface) that I'm guessing is worn steel? The gears do have those bronze...

Where do you see that wear? Handling the gears now it definitely feels (and SMELLS) like the last time this trans was together it was filled with gear oil, not ATF. But I'm sure it could have had ATF in it at some point in the last 45+ years it's been around. Just asking because I have no...

Great info as always thanks AJ and others as well. So I'm trying to visualize in my mind, which side of the synchro teeth on the gears is the 'coast' and which is the 'drive' side? Looking at the 1st gear the synchro teeth seem pretty bad to me, I don't know how I could dress up the teeth that...

OK got some pics here finally, first is the input shaft and the 4th gear synchro teeth... Here's the mainshaft with the 3-4 shift collar removed followed by the shift collar itself; I noticed the collar was a bit loose on the hub, watching some YouTube videos by an expert 4-speed builder...

Hey guys I got my hands on my first Mopar 4-speed to rebuild and it's an 18-spline to boot. My cousin bought it a year or so ago and took it to a local trans shop to be checked out. They said it needs to be fully gone through and my cousin didn't want to spend the money so I decided to pick it...

I think it will still be more cost-effective to stick with this trans, they aren't made of solid gold like I figured they were lol. We can get a reproduction bellhousing and new flywheel for pretty cheap from Brewer's and a Centerforce clutch setup... altogether quite a bit cheaper than getting...

Yup i know about the strength differences those 18-spline boxes are virtually the strongest (and heaviest) 4-speed manuals ever put in passenger cars... i know it's a b-body unit since it has two shifter mount pads. I searched and found a for sale thread where a guy sold one for $700 but it...

About a month ago i helped my cousin go pick up a 4-speed box for his 440 '71 Satellite/RR project. He got it for like $300 so we both assumed it was the 23-spline version. Just for kicks one day at his garage i counted the splines on the input shaft and to my surprise I counted 18 which i...

Just had an idea... you guys think there would be any demand for prefabricated transmission tunnel floor humps to fit bigger aftermarket transmissions? Or do most Mopar owners just not want to cut up their floor pan at all?

I think I read somewhere the aftermarket sales for classic GM car parts is like 80% market share and the rest is Ford/Mopar (I think like 15% Ford and 5% Mopar or something ridiculous like that). So coming out with the Mopar trans first would be a financial shot in the foot so to speak... lots...

Duh nvm speedo hookup is in back I think that is for reverse.

This might help a bit... Seems like a nice package but if I had the choice I would still go with the Passon just to support a Mopar-based business... $2000 is quite a bit of money though :???:

Sounds like that increased production capacity might (very big MIGHT) also lower costs at some point. I've been sick of my 904 for a while now my main dilemma is whether I should go ahead and do a 4-speed conversion in the near future or just wait until I can afford an A-855. I wish I could go...

Awesome story I just wish I had even a 4-speed to do the same. About that tire flex what size rims/tires you running? Might be better off with some sticky lower-profile tires on some 17's if you don't mind the look.