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Super T10 |
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1970390amx 
AMC Addicted 
Joined: Jul/11/2008 Location: colorado Status: Offline Points: 3314 |
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 Topic: Super T10Posted: Jul/31/2020 at 6:59pm |
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A t-5 will only work if you want to drive around and not beat on it. They are not that strong. There are aftermarket transmission manufactures that can build you a 5 speed that will work, expect to pay for it.
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1970 390 4speed Bittersweet shadow mask AMX
1970 Amx missing most everything, or in a box |
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5150Javelin
AMC Apprentice 
Joined: Jan/15/2016 Location: YUCAIPA Status: Offline Points: 45 |
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Posted: Jul/31/2020 at 4:35pm |
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I have a 69 Javelin 390. T-10P-1B After engine build I had at Shop for fine tuning and dual carb adjustment. They had on dyno, hit critical speed, and blew up drive shaft which took out tail housing of trans, broke the dog ear off from of trans where it bolts to Bell Housing and on opposite side broke bell housing where bolts screws in. Unknown if the output shaft or differential is damaged. I read this post. Bottom line, what is best? Stay with the T10, if I can find one and I will post on forum for one, or do I go with the T-5. Will a T-5 bolt in without modification? I assume will need a new shifter, as the hertz won't work. Will shifter on T-5 align with current opening for the hertz shifter? Thanks for the input.
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amc67rogue
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Joined: Nov/05/2008 Location: Phx. AZ. Status: Offline Points: 1578 |
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Posted: Mar/30/2020 at 12:57pm |
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Back in 74 I made my own T10-W. I used a 20 tooth main drive gear from a AMC T10-T. Bought a T-10 W cluster gear. I got 2nd & 3rd. from a GM. T-10 S. Used it my drag car, never had a problem .
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Keith Coggins 67Rogue X code
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Trader
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Joined: May/15/2018 Location: Ontario Status: Offline Points: 6881 |
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Posted: Mar/28/2020 at 2:32pm |
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The problem with the late 60's and early 70's T10 transmissions is that they could be rebuilt with early 60's parts. They are sloppier and weaker.
You would be very hard pressed chewing up a T10 built with 9310 nickel gears and associated parts of the late 60's - early 70's AMC. On the GM Super T10 they marked the gears with a spot drill mark. No such luck on the AMC. If your going to put the T10 behind the 390, get one that you know has not been touched, get one from a trusted re-builder that states they have put in the high nickel alloy gears and associated "better" parts or get it rebuilt with the better parts right from the get go.
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easydean
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Joined: Sep/26/2010 Location: West Fargo, ND Status: Offline Points: 1592 |
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Posted: Mar/28/2020 at 1:04pm |
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I have a 2:64 tranny here with no marks on the shaft - I pulled the cover and counted the teeth.
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6PakBee
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Posted: Mar/28/2020 at 12:44pm |
I don't mean to be beating this to death but I am seriously considering putting a 2.64 T-10 in my Machine. But all I've read on this forum is that the 390 will tear that choice up with any kind of "spirited" driving. That's why your comments are so intriguing. The 409 Chevys came with T-10's from '61 to '63 and I can't recall the 409's taking out the T-10 like the Mopar Max Wedge's did. Just trying to get factual info to try to make an informed decision. Thanks for continuing the conversation!
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Roger Gazur
1969 'B' Scheme SC/Rambler 1970 RWB 4-spd Machine 1970 Sonic Silver auto AMX All project cars. Forum Cockroach |
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bvpotash1
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Joined: Apr/02/2010 Location: Syracuse NY Status: Offline Points: 306 |
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Posted: Mar/28/2020 at 8:19am |
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Auto Gear in Syracuse NY has parts for most manual transmissions in stock
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Trader
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Posted: Mar/28/2020 at 7:19am |
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From my understanding, this is many years ago, AMC started using the Gen 1 BW T10 at the same time they started using the 390 and the Hurst shifter.
This combination was not just a coincidence. The only real difference between the Gen 0 and Gen 1 was the change to high nickel gears, higher load bearings, better shaft materials, better syncro materials/design and some new ratios offered.
Edited by Trader - Mar/28/2020 at 7:21am |
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6PakBee
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Posted: Mar/27/2020 at 8:43pm |
So what you are saying is the 1968 and prior T-10's that AMC used (the 2.43 and 2.64 ratios) did NOT have the high nickle gears? Just trying to understand what is being said here.
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Roger Gazur
1969 'B' Scheme SC/Rambler 1970 RWB 4-spd Machine 1970 Sonic Silver auto AMX All project cars. Forum Cockroach |
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Trader
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Posted: Mar/27/2020 at 7:33pm |
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Forget the spline count for the moment and the Muncie.
Look at the history and the BW T10. GM and Ford used them until around 1969, then AMC started using them as GM, Ford and Chrysler were getting warranty returns in 1968 do to BW transmission failures do to HP/torque failures. Gen 0 BW T10's. AMC bought into the next generation Gen 1 - Super T10 as BW was having problems and AMC took advantage. In 1969 AMC started using a revised cast iron case T10 transmission, Ford and Chrysler also used them to a certain degree as they could not keep up with their own production requirements. Ford had the Top Loader and Chrysler the A833. The 1969 version of the BW T10 had high nickel gears and was far superior to what I'll call the Gen 0 T10. Take a look at how AMC was beating the crap out of the BW T10's and holding the same HP/torque of the Muncies, Top Loaders or A833. These were the Gen 1 Super T10, same as the GM BW Power Brute starting in 1975. AMC still used the cast case Gen 1 Super T10 until end of production (they even used some aluminum case Gen 2 T10's). GM went to the Gen 2 Super T10 aluminum case completely by 1981. But some Pontiac's, Corvette's and Camaro's could still be had with the Power Brute, Gen 1 BW T10 or AMC T10 that everyone would not admit to and still will not to this day. You can tell a GM BW Power Brute by the cast iron case and 7/8" idler shaft diameter - same as the AMC T10. I don't know how many parts swap over from the Power Brute to the AMC BW T10, but I do know some will. Maybe even gear sets? So if the Power Brute and AMC T10 were direct decedents, and the transmission was rebuild using more common GM parts, including the input shaft, spline count means absolutely nothing, count rotations! |
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Trader wrote: