Topic: R series - AX15

[Greg55_99]

Hi Marlin,
    I'm curious just how many parts are interchangeable between the R series Toyota trannies, the Jeep AX15 and the Isuzu AR5.  Can you rebuild one  with parts from the others?  Things like input shafts, output shafts, bearing, cluster gears, etc.  

Greg

[Marlin]

Yes, parts are interchangeable between these trannys.
Inputs, output shafts, front nose cone, and rear housing are differance but generally can be interchanged if you stay with in the family.

There are three "R" familes;

86-91    early, simple, common, heavy design

92-95'    upgraded syncrows, hubs, shift rods and linkage, smaller bearings, lighter gears

96-newer    greater helix angles, upgraded syncrows, lighter bolts, reverse brake

The jeep 86-00' AX15 would use the same bearings, syncrows, and gears within the same family as the toy boxes. I am not sure of the Isuzu production years, but would also be the same.
Remember that only the 86-87' 4x4 R151F 22Rturbo got the 4.31 1st gear. 2x4 22Rturbos, got the 3.83 1st, along with all other 4x4 R trans--- Toy 3.0, 3.4 v6, jeeps, and isusu's.

The lowest geared R is the 5.15 1st gear found in the R452 inported trans which also uses the same bearings, and syncrows.

Hope this quick answer helps

MC

[Greg55_99 [OP]]

Thank you Marlin!  That is some excellent info!  One of my reasons for asking was this.  Wouldn't  (or couldn't) it be possible to rebuild an early R series with the longer AX15 input shaft?  That way, one could use the stock Turbo Supra bellhousing to drop the 7mgte into a Toyo truck....   The AX15 input shaft is only a quarter inch longer than the R154 one.  Not a big deal.  So... could this be done rather than having a new bellhousing cast?

Greg

[Marlin]

The jeep AX15 has a 10 spline americian style input with a 5/8" pilot. Do you mean a 96' and newer 29 spline R150F input that fits the Toyota components?
Just get a 96' and newer 3.4 V6 Toyota trans and use my 3.4 to 4 cyl t/case adapter and by using the 7MGTE bellhousing, bolt it up?

[supratruck]

How do you plan on keeping the input shaft from bottomiing out in the pilot bearing?

[4ltrcj7]

I have a line on a r151f and  its tcase for a great price. I would like to try to put this behind a Jeep 4.0 (flame suit is on).
I am planning the ax-15 bellhousing, swapping in an ax-15 input shaft and whatever else is necessary. Basicaly I want from the trans forward off the shelf Jeep and from the trans back Toyota (and uh Marlin gears of course!)

The only other issues I see I would have would be the u-joints (use conversion) and fabbing a mount and poss shifter issues. I believe the shifter locations are the same or close enough for govt. work.

Is the input shaft from the ax-15 definitely swappable into the r151f???
I will base my purchase on a confirmation of this.


Does anyone know somebody that has actually done this?

Thanks in advance.

[Marlin]

I am currently converting a Jeep AX5 to a toyota t-case

I have never had to opportunity to upgrade a AX15.
This can be done but only to a 86-91 AX15. The longer corse spline input and Jeep nose cone will swap right in
The AX15 bellhousing will also bolt up to the front of the R151F since both front housings are the same!

I send both Toyota and Jeep shafts to my drive line shop and have them put togeather.
We sell a steel t-case mount bracket to help you build your custom cross member.


Marlin

[jr9162]

Yes, parts are interchangeable between these trannys.
Inputs, output shafts, front nose cone, and rear housing are different but generally can be interchanged if you stay with in the family.

There are three "R" familes;

86-91 early, simple, common, heavy design

The Jeep 86-00' AX15 would use the same bearings, syncrows, and gears within the same family as the toy boxes.
Remember that only the 86-87' 4x4 R151F 22Rturbo got the 4.31 1st gear.

Hope this quick answer helps

MC

Wouldn't it be possible to rebuild an early R series with the longer AX15 input shaft? That way, one could use the stock Turbo Supra bellhousing to drop the 7mgte into a Toyo truck....   The AX15 input shaft is only a quarter inch longer than the R154 one.  Not a big deal.  So... could this be done rather than having a new bellhousing cast?

Greg

I have never had to opportunity to upgrade a AX15.
This can be done but only to a 86-91 AX15. The longer corse spline input and Jeep nose cone will swap right in
The AX15 bellhousing will also bolt up to the front of the R151F since both front housings are the same!

I send both Toyota and Jeep shafts to my drive line shop and have them put togeather.

Marlin

Marlin, please develop this thread a little further.

To install a 86-87' R151F turbo tranny behind a 5M thru 7M series engine we could swap in a 1st generation Jeep AX15 input shaft and front nose cone (input shaft bearing retainer). As Greg stated the resulting input shaft length is only 0.250 (one quarter) inch longer than the 87-92' Toyota Supra R154. The hybrid R154F could then be bolted onto the 5M, 6M, or 7M using a 7M-GTE bellhousing. Of course one would have to use the proper 10 spline clutch disk.

Supratruck has inquired how Greg intended keeping the hybrid R151F input shaft from bottoming out on the pilot bearing? That is one of my concerns too. Would you simply shorten the AX15 input shaft by the quarter inch, use a special input bearing to compensate, or is there no consequence?

In rebuilding the hybrid R151F does one use your standard transmission rebuild kit (featuring NSK and Nachi Japanese made bearings, including seals and gaskets)? Or is it necessary to utilize some components generic to the AX15?

Can one also use your CNC machined R series transmission heavy duty bearing cover plate? 

JR

     

[ccannon222]

Marlin,
I am planing on either putting an R151F or R150F with an R151F Bellhousing in the place of my W56 in my 85 4runner.  Will the R151F bolt right up to my stock motor and topshift t-case?  Also, will I need to lenghten or shorten my drive shafts?

Thanks

ccannon

[Greg55_99 [OP]]

Marlin, I need some clarification. 

1.  Can the 86-91 AX15 input shaft be swapped into the R151F and keep the same first gear ratio?

2.  Can the AX5 input shaft be swapped into a W series trans?

Greg

[GRABBER]

Marlin,
Im wanting to put a toyota gear driven transfercase behind an AX15 in my wrangler, I know you said this was possible with the AX5. Is this possible with the AX15 ? And what is involved, or how much would it cost to have it done by your shop? Im also planning on running toyota axles. Do you see any problems with this set-up on a wrangler?
Thanks for the info.

[jr9162]

Thanks to John Douglas http://members.ozemail.com.au/~jonhel5/
I learned that Marks makes an adapter to mate the R150F, and/or R151F (both with 165 mm or 6.5 inch long input shafts) to a G52/54 or W56/W58 bellhousing.

See http://members.iinet.net.au/%7Eozrunner/AdapterR150.html . I am waiting on the Marks part number. This unit should be available in the US via Advance Adapters - Marks agent in North America.

So just take your turbo Supra 7M-GTE block, use a 5M-GE flywheel - clutch assembly - and (W58) bellhousing assembly, this adapter, and mount your trusty R151F to the engine. No more trashed G52/G54 or W56's!

JR

[jr9162]

The part number for that adapter plate is MFK 750 cost is $375 (Australian ?) from the Marks factory in Melbourne. It adds 16mm to the length of the drivetrain. I'm waiting on clarification if it requires removal of the input shaft bearing retainer/cover on the R150F/R151F/R452

JR

[dildinon]

How do you plan on keeping the input shaft from bottomiing out in the pilot bearing?

this one was never answered. is this even an issue? thx.

[40XJeep]

Bringing this one back to the top with a different slant.  I have a 93 Cherokee with an AX-15.  The trans is good, but high mileage.  The question is if I had a 91 AX-15 and was going to rebuild it, would it be possible to install the 4.31 low 1st gear parts from a r151f?  If so, how much are the parts?  Do you sell AX15 rebuild kits (as long as the trans is apart, might as well do the whole thing)?  If I were to find a r151f in the junkyard, which parts are needed to do the swap?  Any other thoughts on pros/cons, durability, noise, etc. I would like to stay with the AX15 and np231 tcase, as I have had good experiences with them.  Thanks.

[Smokey4201986]

Are the snap rings interchangeable between the transmissions in the ax15 and r150f