4r100 went bang

mustube · Jan 28, 2014

The truck in my signature had the tranny rebuilt in April of last year and the tranny just went bang and then nothing as I was on the access road on light throttle. I have a warranty but I'm just curious what it could have been or what to look for. I have no gears forward or reverse and the motor starts and runs fine and no weird noises it just doesn't move. No fluid leaking either.

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kanuck15 · Jan 28, 2014

Sounds like the coast clutch let go

David N · Jan 28, 2014

Could be input, could be overdrive planetary. There's really no way to know until you tear into it.

Mark Kovalsky · Jan 28, 2014

kanuck15 said:
Sounds like the coast clutch let go

The coast clutch wouldn't be applied, so that certainly isn't the problem.

It could be several things. The only way to know is to open it up.

mustube · Jan 28, 2014

They towed it away this evening so I should know tomorrow or the day after.

mustube · Jan 29, 2014

There was a code for incorrect gear ratio stored in the computer so they got authorization to pull it apart tomorrow to see what went boom.

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PSD POWER007 · Jan 31, 2014

Who did the build?

mustube · Jan 31, 2014

Oliver Brothers in Bryan, Tx. The shop that has my truck now said a shaft broke but when I asked him which one he said a support shaft so I'm not sure if that means the intermediate shaft or the support hub or what but I'm going to talk to them monday.

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mustube · Feb 1, 2014

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mustube · Feb 1, 2014

The shaft on the left is mine

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redneck1 · Feb 8, 2014

Intermediate shaft. Go for a billet shaft, peace of mind and it won't break right away again. My trans been apart twice with that shaft, third time I dropped the dough and figured it was worth it. Glad to see you got it figured out.

mustube · Feb 8, 2014

Yeah, I don't have 650 to spend on a shaft and it was under warranty. I don't have the power to break a shaft and I've also heard of the billet shafts breaking too. If it happens again I'll try the heat treated shaft that john woods offers.

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Rideracelivemx7 · Feb 8, 2014

thats exactly what i was going to say what happend to your trans. i blew the intermediate in my BTS as well. BANG and right in to neutral, no pump noise, forward or reverse. Glad you found the issue

mustube · May 2, 2014

Happened again yesterday. Back to the shop today. Warranty ends next week so I got lucky with timing I guess. This problem definitely has some shifting issues causing it. Sometimes it doesn't want to shift into third at all unless I tap the overdrive button, and both times it broke, it did so right after the 2-3 shift. Fingers crossed they fix it right this time.

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ToMang07 · May 2, 2014

mustube said:
Happened again yesterday. Back to the shop today. Warranty ends next week so I got lucky with timing I guess. This problem definitely has some shifting issues causing it. Sometimes it doesn't want to shift into third at all unless I tap the overdrive button, and both times it broke, it did so right after the 2-3 shift. Fingers crossed they fix it right this time.

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I'd be looking to extend the warranty too....sounds like it's developing MORE issues.

mustube · May 2, 2014

I don't think it has any new issues. It did that last time a few times before it broke, I just didn't know the overdrive button would make it shift since my wires were broken on the shifter handle

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littleredstroker · May 2, 2014

I don't think it has much to do with having too enough power... maybe more to do with 37s , stock gearing.... who knows? I would def be upgrading...

Gearhead · May 2, 2014

Wonder if something is binding. Are you running any kind of programmer? If oliver brothers cant keep it running i have another guy local to Bryan that can build a good 4r100

mustube · May 3, 2014

Matt I have your tunes on a hydra chip.

I think the 37s are not the issue. How many trucks are out there with 37s or larger? You can't tell me they are all breaking intermediate shafts and having shift issues. Something got missed in the rebuild.

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range91 · May 3, 2014

I had a customer break his twice crew cab on 315's he had a ts chip. Another customer that had 38r with hybrids that never broke intermediate shaft
And he beat the **** out the truck. Weight gearing tire size and shift firmness all plays in here.

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