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Build MNR 4600 class 2021 U4 Bronco
- Thread starter JR4X
- Start date
- Thread starter
- #3,003
Got the worn out clutch pulled out of the Bronco yesterday. Looking at retrofitting a 10R80 in place of the MT88. The transmission cases of both are exactly the same length. Got the advanced adapter ordered to re-use my atlas.
Dad’s engine is out for a refresh. Prep season in full swing.
Dad’s engine is out for a refresh. Prep season in full swing.
reptillikus
ate lug
Wild that the two transmissions are basically the same size.
Whats your plan for transmission control? Quick10?
Whats your plan for transmission control? Quick10?
- Thread starter
- #3,005
Yep quick 10 is my only hope.
reptillikus
ate lug
I hope it works out! Im not sold on the 10spd yet. Are there upgrades for them yet?
'84 Bronco II
El Chingón
- Thread starter
- #3,010
Do you know of any issues with the 10 speed in the littler vehicles? The only issues I know of are 10R140’s in superduty’s. The 10R80’s in all the broncos and rangers I know of have been flawless. I’m not nervous about the trans itself. It’s rated for over double the input power and torque my little 4 banger is putting into it.
- Thread starter
- #3,011
I’m keeping it for sure. I’ve been gathering up 2.3’s so it’s going to get swapped into something around here eventually. It might end up going in a geo tracker if I can’t get an engine running in it real soon!I was wondering the same thing
I would love to swap on into an early Bronco.
arse_sidewards
Well-known member
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- May 19, 2020
- Member Number
- 71
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What's the output spline count and transfer case pattern?
YotaAtieToo
Thick skull
Guys are running 1500+ hp through the 10r80 in mustangs and F150s. They're solid.
I bet I would be really nice to not be rowing gears and messing with a clutch in the rocks.
Also put me in the group who wants one of those manual trans for a project
I bet I would be really nice to not be rowing gears and messing with a clutch in the rocks.
Also put me in the group who wants one of those manual trans for a project
- Thread starter
- #3,015
Regular old ford 31 spline output shaft. But the T-case pattern they made one off crazy pattern and while they look the same the manual and auto are way different. From the factory the T-case bolts straight onto the back of the transmission with no adapter.
This a-a-dapter makes it fit the jeep circular pattern that AA adopted.
Edit: you have to read down but it says the 6R80 and 10R80 have the same trans pattern and output shaft.
arse_sidewards
Well-known member
- Joined
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- Member Number
- 71
- Messages
- 10,754
That's bog standard F150 stuff. The F150 kept the 31spl+6-bolt for a few years after the Superduty changed it up (with the introduction of the ZF6 and 5R110 in the early 00s) and then later in 2009 F150 went to that different mounting pattern but kept the shaft spline. IDK about the bore index but it sure looked the same that one time 10yr ago I had occasion to handle a mid 2010ish F150 transfer case. They set the input way deeper into the case than the old stuff too.
Edit: you beat me to it with your edit.
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- Thread starter
- #3,018
Tired of being outran by the other ecoboosts with automatics. The automatics don’t dump the boost when they shift so those things pull hard. Every time I push in the clutch to shift, it BOV’s and waste gates then has to build boost back from nothing. It doesn’t sound like much but it makes a big difference.
makes sense
chaplinfj60
Well-known member
i would think it would be a huge difference considering the amount of gears and the close ratios of a auto. totally get it...
- Joined
- May 20, 2020
- Member Number
- 788
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4600 rules.. stock case for the year of manufacture
build sequential inside the OEM case, doesnt say it has to be the OEM guts have to say in the case.
**** yeah, hollow that bitch out and stuff an Ablins or Hollinger in it.build sequential inside the OEM case, doesnt say it has to be the OEM guts have to say in the case.
Lincoln
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- May 20, 2020
- Member Number
- 408
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A friend runs a small fleet of mostly rangers with a few Maverik's. He was complaining to me that the transmissions are failing at 60k-70k. They don't run them super heavy but there is a bunch of **** in the back. Maybe they are all covid issues, I'm not sure.
I'm also not positive what motor and tranny are in them.
- Thread starter
- #3,028
The first race broncos just finished up their 5th or 6th years of racing on the original transmissions and engines. The Funhaver one has raced more than any of them and I was just over there looking at it last Friday. Racing is probably a little undue hard on things but they’re prepping it for 2026 right now. 50 or 60 is a long ways out in race seasons for us. Junkyard 10 speed transmissions from a 2.3 EB are pretty affordable right now because nobody is buying them. I’ll take my chances because the other broncos are running away from me in a drag race when all other things are equal.
- Thread starter
- #3,030
No, but I weigh less, a lot less. And they don't make much more power than I do. I’m almost exactly 5,000 pounds wet before I get in it. All the V6 ones are 6,000 pounds or more before they get in them. At the Laughlin desert classic we did land rush starts. On day two the other Bronco and I smoked every other vehicle to the first turn but I had to check up at the 3rd turn because Kendall Glines had me by a fender length. I think if I have an auto I can be the one going into that turn half ahead of the guy next to me. You can see what I'm talking about in Sluggy at the top of this page.
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