Putting a different transmission behind a DT466 - Need some wisdom Spicer 6+1 to ?

Andy1845c · 2022-08-14T16:02:12.000Z

Hey guys, as the title says I need some wisdom from some of you that work on this stuff daily. I bought a 98' International 4900 S/A tractor cheap. Has the Spicer 6+1 7 speed that was really common in these trucks. Its a an ES065-7A. Only had L and R functioning. Pulled it yesterday and the pocket bearing on the input shaft is gone as are the splines where the mainshaft splines into the output shaft. Basically all the shafts are toast. I stopped there and didn't get into the forks. I think one of those is damaged too based on debris I found. SO. This isn't my dream transmission. Questioning how many dollars I want to put into it. It was supposedly replaced around 150k miles ago. Has anyone seen this before? the tag is clearly stamped ES065 - I am thinking its a 650 ftlb rated transmission- right on the edge of what my engine should be outputting. Do the HT 466's tear these up or did I just get an anomaly? I kind of want a 13 speed or an 8LL or something more fun/better for off road use. Making the truck into a little dump truck. What kind of pitfalls am I going to have putting one of these in here? I believe I have a Sae #2 bell housing/clutch housing. I have a pull type clutch, but the spicer has no trans brake. 10 spline input shaft. I see some other transmissions out there that look like that would work, would just have to add a rear support and shorten the driveshaft. I am thinking the shift tower may move back too? Basically looking to talk this out with some of you to decide what route to take. There is a 77' frieightliner for sale locally with a 13 in it behind a 350 cummins. I haven't go a hold of the seller yet to see if I can go look at it for the transmission. Its a CEO so i'm sure the sifter wouldn't work but might the tower? I can't find much info on what bell housing a 350 would have. Anyone know? As for the trans brake, if I found a transmission that has one, I assume the pull type clutch should be compatible to operate it or am I looking at having to change out clutch and throw out bearing too?

Started by Andy1845cAug 14, 202242 replies

hseIIJunior MemberJul 18, 2026#41
Truck Shop said: Page 7, items #8. * https://www.progearandtransmission.com/manuals/Eaton-Fuller-RTX-12609B-Transmission-Parts-Manual.pdf Click to expand... Thank You. I’ve seen a few 9 speed Fuller DT466E trucks for sale & felt like there was some kind of trick.
TenwheelerJunior MemberJul 20, 2026#42
Truck Shop said: Page 7, items #8. * https://www.progearandtransmission.com/manuals/Eaton-Fuller-RTX-12609B-Transmission-Parts-Manual.pdf Click to expand... Interesting: I caught hell finding a housing for a 9509 replacing a 5 speed years ago. Almost no one knew anything. Cannot knock this modern technology sometimes. Look things up and or get an answer from someone who knows looking a different ocean.
Truck ShopSuper UserJul 20, 2026#43
Tenwheeler said: Interesting: I caught hell finding a housing for a 9509 replacing a 5 speed years ago. Almost no one knew anything. Cannot knock this modern technology sometimes. Look things up and or get an answer from someone who knows looking a different ocean. Click to expand... Eaton built so many combinations--all on the same basic platform.

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