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Post by hurst390 on Sept 23, 2023 5:01:01 GMT -8
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Post by n2ojoe on Sept 23, 2023 5:16:37 GMT -8
Thanks Jim, I'll ask him. What do you think I could get away with for 1st gear ratio on these little tires? I'm finding several SLR charts floating around, but most appear to be for an automatic transmission. The car with me is roughly 3550 lbs, and a 4.56 rear gear is working out to around 7k rpm on the 26.18" F60-15 Polyglas tires. I plan to go to a 4.44 gear to drop that a few hundred rpm's.
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Post by hurst390 on Sept 23, 2023 10:13:50 GMT -8
Heck I dont know Joe. Lowest Ive had in my Scrambler is the 2.64. It has the chevy 2.64 set now different 2nd but I dont remember what it is. Seems like Transmissions by Darrell? in Indiana is where I bought the chevy version gearset. He had lots of that kind of stuff new If I remember right.
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Post by hurst390 on Sept 24, 2023 4:36:28 GMT -8
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Post by n2ojoe on Sept 24, 2023 4:59:27 GMT -8
Thanks Jim. You have me interested in the Chevy 2.64 gear swap now. Is the input shaft still AMC? I'm curious if the Chevy 2.64 cluster gear, 2nd, and 3rd gears could be fit into the AMC T10 with some work. MUCH better gear spread.
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Post by 69Rebel on Sept 24, 2023 6:22:46 GMT -8
Ok, I'm ignorant. What is the difference between a AMC T-10 and any other T-10, aside from the input shaft? Are they not the same case?
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Post by sc397 on Sept 24, 2023 8:20:27 GMT -8
I don't know either but I will throw some BS out there anyway. As near as I can figure the main case is the same with exception of the top loader and I don't know about the Super T10. The tail housing differ between the OE manufacturers. Some have shifter provisions, some don't. Because of the tail housing difference, I assume that there may be differnces in main shafts but I could be wrong. I asked a old time T10 rebuilder what the difference is between a normal T10 and a Super T10 and his answer was that they are two completely difference transmissions which was a huge help to me. Not. Believe it or not, AMC used a T10 with a Torque Tube in the Torque Tube years behind the 287, 327. www.hemmings.com/stories/article/borg-warner-t-10-four-speed
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Post by 69Rebel on Sept 24, 2023 9:19:54 GMT -8
My question was why Chevy T-10 parts won't go into an AMC T-10. The torque tube stuff would be obvious, and Super T-10s are super and all.
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Post by spud on Sept 24, 2023 20:27:01 GMT -8
I dont know all the differences, i hear tell the supers have a 1” countershaft, so the case and cluster was different, and some supers had spur gears instead of helical, so the statement they are completely different is pretty true. Super t 10s are said to have been mostly gm. I do not believe THERE WERE EVER ANY AMC SUPER t-10s, the super series did not come about till the mid 70’s. There is info about this in remote places in cyberspace. I think its a moot point due to racing a t 10 has a limited lifespan and parts for old trans are not exactly cheap or plentifull . There are still a few sources for parts and service.
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Post by hurst390 on Sept 25, 2023 4:16:31 GMT -8
Thanks Jim. You have me interested in the Chevy 2.64 gear swap now. Is the input shaft still AMC? I'm curious if the Chevy 2.64 cluster gear, 2nd, and 3rd gears could be fit into the AMC T10 with some work. MUCH better gear spread. Yes I still have the AMC Input. I bought the cluster and 1st and 2nd gear from the 4 speed by Darrell guy.It was all new and reasonable at the time. It is a much better gear spread than the AMC gearset. I just dont remember what it is. I did this in the mid 90's Honestly 3rd gear might be different too I just dont remember. But its all in an AMC t-10
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Post by hurst390 on Sept 25, 2023 4:28:24 GMT -8
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Post by n2ojoe on Sept 26, 2023 10:52:48 GMT -8
Thanks for the leads Jim, I did a little research and can't believe this gear swap isn't talked about more often. Very easy upgrade with a few factory parts from the mid 1970's GM "W" code T10, using the AMC 2.64 input, GM 1.75 2nd gear and 1.33 3rd gear, and cluster gear. I talked a bit with Brian Higgins at SK Speed (what a super nice, knowledgeable guy!!) and ultimately ordered one of his custom made AMC 2.64 input shafts with GM 26 spline clutch to prevent twisting the stock 10 spline, and all the gears needed to build my own wide ratio. This will be a great version for street/strip, since it's all still syncronized. I'll use this in the Pure Stock 70, and put the fresh pro shifted 2.72 trans back into the 74. Heck, I may build another 2.64 GM gearbox for the 74 too.
I REALLY like the GM "X" ratio 2nd and 3rd in the pro shifted trans (1.60, 1.23) but it seems that cluster gear is VERY hard to find.
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Post by spud on Sept 26, 2023 14:55:08 GMT -8
I wasted time and money finding the 2.64 low trans and was mortified when i drove it. It never really occurred to me how bad the 2.10 second and 1.77 third were going to be untill i found out the hard way. It was so much worse than the 2.43 low trans. The gm ratios are so much better. I got lucky when i used the bellhousing from my hornet amx ( which was just taking up space in the garage) and i used it to stand a toploader up to put a rear seal in. It was a perfect fit. The lightbulb came on. And soon i was selling off amc t10s. The wide ratio toploader has a very good ratio spread. So what are the ratios going to be in your proposed assembly?
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Post by PHAT69AMX on Sept 26, 2023 17:28:53 GMT -8
old saved info from who knows where, so...
AMC T-10 : P 2.43 - 1.76 - 1.47 - 1.00 T 2.64 - 2.10 - 1.49 - 1.00 V 2.23 - 1.77 - 1.35 - 1.00 -> 2.64 - 1.91 - 1.?? - 1.00 = Ray-Wel "Custom"
1974-77 GM Super T-10 2.43 - 1.61 - 1.23 - 1.00 2.43 - 1.76 - 1.47 - 1.00
1977-79 2.64 - 2.10 - 1.60 - 1.00 -> 2.64 - 1.75 - 1.33 - 1.00
1979-81 2.88 - 1.74 - 1.33 - 1.00
1980-82 3.44 - 2.28 - 1.46 - 1.00
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Post by n2ojoe on Sept 26, 2023 21:01:20 GMT -8
Spud, this will be the 77-79 ratio in Phat's chart, with 2.64, 1.75, 1.33, 1:1.
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