fasteddy
Web Wheeler
Reged: 01/30/01
Posts: 12707
Loc: Flat Creek, GA
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I think most of the data is here, and maybe all we need is a list of links to archived stuff and sites, but I have specific questions, since I'm about to spend the bucks for the parts.
I'm doing the V6 lockup converter mod. Does the v6 tcase bolt and spline to the 4cyl tcase, and is there any advantage to the v6 case. I'm also going to do a v6 front diff swap in prep for (hopefully along with) a front lsd. I may also do a regear to 4.222, and if so, do the 4.222 p/u gears fit the monty v6 front lsd, AND the 2.6 leaf spring rear diff, or do I need a v6 (and monty or p/u?) rear axle with leaf perches (and maybe soa in the rear). Rear will have a sway bar if I can find room, with an Aussie disco. Also want to figure out rear discs, even if I have to have a manual rear brake pump and an isolation valve.
How 'bout driveshaft yoke spline sizes? All the same??
For the rest of the bible, we need a section on tcases, like which ones for sure have neutral detents, do a/t and m/t tcases have the same input? Word on pto's, too. I'd also like some word on Lloyd's deal on mods to later tcases to avoid major chain failure, if any body has the detail word.
Section on diffs, lsd's, lockers, etc.
Section on m/t's, and a/t's, too.
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"If you can't be a good influence, don't worry, you can still be a horrid example."
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FrankR
Web Wheeler
Reged: 02/01/04
Posts: 10225
Loc: Columbia, SC
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Transfer Case Assembly for '89
2.6L M/T = MD729807
2.6L A/T = MD729808
3.0L M/T = MD733918
3.0L A/T = MD733924
The case appears to be the same for both M/Ts and for both A/Ts:
M/T = MD716569
A/T = MD721485
There are some cable brackets that are different and the speedometer cables are different.
There appear to be a few more minor differences in the Ram models - brackets, cables, nuts, pulse generator, cover gasket, speed sleeve, etc.
Output shafts are the same for all models.
Hope that helps.
Frank
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'89 G-Raider Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 155k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, 165A alt., Lifeline AGM, Rust-Oleum
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ForcedAir_Montero
Body Damage is Cool
Reged: 04/21/03
Posts: 1393
Loc: Maple Falls, Washington
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I know the t-case gears are different between auto and manual, and I thought the V6 AUTO tranny had a different spline count. That's what would be required if/when we get further in the NP231 swap.
Driveshaft spline is the same, but V6s used a different flange at the rear pumpkin.
The front was stock V6 length after I swapped in a V6 A/T AND a V6 front diff.
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-Dave D
Reservoir of Useless Knowledge
"But... If I kill all the golfers, they'll lock me up, and throw away the key..."
-Bill Murray
'84&change Monty MPI Turbo, choptop, f&r lsd, swapped in AT- All the goodies!
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FrankR
Web Wheeler
Reged: 02/01/04
Posts: 10225
Loc: Columbia, SC
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Quote:
I know the t-case gears are different between auto and manual, and I thought the V6 AUTO tranny had a different spline count.
Correct on the gears - I missed that one. The input gear is different between manual and auto:
M/T = MD731636
A/T = MD732599
As far as I can tell, the FSM parts list shows the same F/R ouput shafts for M/T and A/T.
Frank
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'89 G-Raider Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 155k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, 165A alt., Lifeline AGM, Rust-Oleum
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PHIL
Mitsubishi Section Editor and Moderator
Reged: 01/09/00
Posts: 7145
Loc: Airdrie, Alberta
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Great idea. Why don't I sticky it, and when we have enough built up here, we'll turn it into an article for the tech section, that we can update as needed...
PHIL
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93 Pajero 2800 turbo diesel: "Ol'Betsy #5"
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Kevin C
Trail Leader
Reged: 05/20/00
Posts: 6033
Loc: No where in particular
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Quote:
I think most of the data is here, and maybe all we need is a list of links to archived stuff and sites, but I have specific questions, since I'm about to spend the bucks for the parts.
I'm doing the V6 lockup converter mod. Does the v6 tcase bolt and spline to the 4cyl tcase, and is there any advantage to the v6 case. I'm also going to do a v6 front diff swap in prep for (hopefully along with) a front lsd. I may also do a regear to 4.222, and if so, do the 4.222 p/u gears fit the monty v6 front lsd, AND the 2.6 leaf spring rear diff, or do I need a v6 (and monty or p/u?) rear axle with leaf perches (and maybe soa in the rear). Rear will have a sway bar if I can find room, with an Aussie disco. Also want to figure out rear discs, even if I have to have a manual rear brake pump and an isolation valve.
How 'bout driveshaft yoke spline sizes? All the same??
For the rest of the bible, we need a section on tcases, like which ones for sure have neutral detents, do a/t and m/t tcases have the same input? Word on pto's, too. I'd also like some word on Lloyd's deal on mods to later tcases to avoid major chain failure, if any body has the detail word.
Section on diffs, lsd's, lockers, etc.
Section on m/t's, and a/t's, too.
The 4 cyl auto transfer case bolts on to the V6 auto.
The transmission cases are the same between lockup and non lockup, 4 cyl and V6's (autos 87 to 91 ).
Bell housings, pumps and valve bodys are changed for lockup vs non lockup, V6 and 4 cyl.
I have found in my Raider the lockup converter is just fine with 4.66 gears and 33" tires. I dont reccomend taller gears.
The OD unit and torque converter clutch have lived with full throttle and lockup and did not seem to be bothered one bit.
I picked up and easy 2 MPG with the lockup converter that I lost with my taller tires. I got 20 MPG at 70-75 mph on 31's. That included a bit of LA stop and go.
Kevin
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87 Dodge
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LandRaider
Forum Moderator
Reged: 09/04/01
Posts: 8409
Loc: Ocean Springs, MS
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Only Manual Transfer cases got a neutral detent stock, but the auto transfer cases have a neutral spot... only no detent. You just have to make a detent in the shifter rod, and you have neutral on an auto case.
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87 Raider 4.3 700R4 NP231CHD
Solid Axles, Selectable Lockers, 36's
87 Raider 4D56td v5MT1
Almost all stock.
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Kevin C
Trail Leader
Reged: 05/20/00
Posts: 6033
Loc: No where in particular
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PN's for axles into the front diff:
PN MB393911 is a 28 MM OD clip for the small diamter axle, 4 cyl.
MB393884 is a larger , thicker clip for the passenger side axle on V6 front diff 30.5 mm OD.
MB526189 is 29.7 OD clip for the V6 front axle , drivers side.
Kevin
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87 Dodge
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Anonymous
Unregistered
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Can u list all availble gear ratios for GenI Monty/Raiders? I have a friend that just picked one up w/a blown engine and will be swappin in a Ford a Chevy V6 and drivetrain. He may possibly re-use the rear axle. He's going 33's. Front axle will be coiled Dana 30HP (he has many!). Thanx.
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fasteddy
Web Wheeler
Reged: 01/30/01
Posts: 12707
Loc: Flat Creek, GA
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3.909
4.222
4.625
4.875
5.29?
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"If you can't be a good influence, don't worry, you can still be a horrid example."
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