Does a 2jz bellhop sing match up the the 1fz?
5 speed auto (1 Viewer)
- Thread starter scottryana
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- Thread starter
- #82
Don't know, but from the pic above we know the A343F and A340 that the supra uses, look to be the same bolt pattern. lol.
A750F came out behind the 2UZ & 1HDT..I wouldn't even need to do a bellhousing conversion after all 
I would have thought the 1FZ might have shared the same pattern as the 1HZ & 1HDT ..it does not.
It's hard to go off pics alone but it doesn't look like either 1FZ bellhousings off either transmissions is going to bolt the the A750F..worst case though guys just get a adapter ring machined up so you can bolt your FZ bell up, still doesn't sort the control side of the trans though
I would have thought the 1FZ might have shared the same pattern as the 1HZ & 1HDT ..it does not.
It's hard to go off pics alone but it doesn't look like either 1FZ bellhousings off either transmissions is going to bolt the the A750F..worst case though guys just get a adapter ring machined up so you can bolt your FZ bell up, still doesn't sort the control side of the trans though
A 4l80E would be fine too. if there was a way to get any of the universal GM transmissions behind the 1fz Id look into that as well. I have a buddy with an LQ9 jeep 4l80e/atlas 4spd and it sure is a slick setup...
Doesnt mean we probably couldn't design an adapter....
similar to what someone else did on another project....
The 1FZ has officially joined the 6 speed RA60 transmission. The mounting flange from the old A442 bellhousing was cut and removed, then TIG welded directly to the RA60 bellhousing. A few redundant steel braces will help support the weld... cast aluminum is cast aluminum, after the TIG is done, it can only be so strong.
Centering the transmission to the engine was a slight challenge due to the fact that the RA60 uses no pilot bearing. A 3.5" long sleeve was machined and used in much the same way that a clutch alignment tool is used. The sleeve slides over the transmission's input shaft, and then slides into the pilot bearing hole in the crankshaft as the transmission is set into place against the back of the engine.
Now on to machining the flywheel and adapting the Orion....
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Many have thought similarly, but the "someone" below confirmed otherwise, although a few modification he made sound easy (keep in mind the source) would've accommodated a 1FZ.
modifying the A750F bell housing and welding the 1FZ mating flange in a similar fashion to bjowett's build may just be the first hurdle. How about the input shaft from the 1FZ motor? are they the same length/splines? A lot of things have to be looked at and measured
1FZ-FE is 14 spline and extends flush to BH.
There are three or four shops I've discussed mating bell housings together, not a big deal (although pricey and Australian. CRIKEY!), but those marriages were manuals, so not 1/100th the complexity of this endeavor.
Based on a process of deduction that most recently failed me, on a much more mundane assumption, I'd think the input shaft issue can be resolved, since the H151Fs from '98-'07 for a 2UZ-FE are the same, as are the bellhousings.
Since overlapping the same years of A343F to A750F transition, it'd begs consideration given that they're all the same, therefore an +'98 A343F input shaft could be either the same, or swapped to an A750F input shaft, and a bellhousing fabbed to the correct length, in lieu of another UZ variant that fits both the A750F and 1FZ-FE.
There are three or four shops I've discussed mating bell housings together, not a big deal (although pricey and Australian. CRIKEY!), but those marriages were manuals, so not 1/100th the complexity of this endeavor.
Based on a process of deduction that most recently failed me, on a much more mundane assumption, I'd think the input shaft issue can be resolved, since the H151Fs from '98-'07 for a 2UZ-FE are the same, as are the bellhousings.
Since overlapping the same years of A343F to A750F transition, it'd begs consideration given that they're all the same, therefore an +'98 A343F input shaft could be either the same, or swapped to an A750F input shaft, and a bellhousing fabbed to the correct length, in lieu of another UZ variant that fits both the A750F and 1FZ-FE.
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That's too bad. I wonder if you machine the center hole if the bolt holes would line up.
- Thread starter
- #90
yeah seems awfully lazy to just quit after a 1/2 throws you off. lol. That's 1/4" all around hell you could do that with a grinder. lol
I think this a750 may be as close as we can get to a semi easy swap. We really need some measurements. That 3.50 first gear paired with marlins crawler low gear in the diff and 5.29's would really crawl!
Wasn't long ago, Booger was looking at doing some similar crazy chit, and had me thinking enough to talk to Robbie about.
While a brief conversation, Robbie speculated that the cases themselves, may be damn near interchangeable, as the guts of the tranny were pretty much whole, sliding complete into the case, with different tail housings,
No burden on Robbie for info, since the discussion was completely different circumstance than here, but begs the questions as to how close the cases may be, and if the tail shaft housings may be interchangeable.
Granted, all speculation, ESPECIALLY on my part.
While a brief conversation, Robbie speculated that the cases themselves, may be damn near interchangeable, as the guts of the tranny were pretty much whole, sliding complete into the case, with different tail housings,
No burden on Robbie for info, since the discussion was completely different circumstance than here, but begs the questions as to how close the cases may be, and if the tail shaft housings may be interchangeable.
Granted, all speculation, ESPECIALLY on my part.
What would be the final drive ratio with the A750F compared to the A343F and would there be an expected gas mileage advantage? With the price of gasoline so high and the stock MPG of our gasoline/petrol 80's so low what I would like to see is a transmission with a higher that usual final drive ratio like some of the newer or soon to be released 8+ speed automatics. Or maybe a transfer case with OD?? Hijack over.
specs between the two:
gear vendor done.
gear vendors makes a unit for the fzj80?
inkpot
SILVER Star
I read that as about 4% difference
- Thread starter
- #98
Yep, the over drive isn't much, but the SAE document says that there is much less powerloss in the transmission. It has been shown that there is over 30% driveline loss on these truck. So your 212hp 1FZ only puts 135hp to the ground or so. If you could put another 15hp down it would be more than an 11% power increase.
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So one with a H151F outta be able to smoke your ass then, right?
- Thread starter
- #100
If it had a turbo, yes, if not I am still going to kick his ass 
lol
lol
