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mk1 driveline strength?? power and big wheels equals?

Tech Talk for Mitsubishi owners.

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Posts: 6
Joined: Tue Jul 10, 2007 9:07 pm
Location: Launceston Tasmania

mk1 driveline strength?? power and big wheels equals?

Post by blue_vl_t »

well i have a 1984 pajero swb with a 308 holden motor and t350 auto, currently have 33 x 12.5 muddies, cranked torsion bars 2" lift.

I'm looking at spacing the wheels outside the gaurds or fit different offset rims and some 35" or 36" tryes, simex centipedes or something similar.

has anyone seen such a setup, it's just, i have not broken anything yet, but are the diffs all that strong, also the transfere case, driveshafts etc

The transmission is no worries, just all the stock mitsubishi stuff has me a little concerned, perhaps cv joints in the ifs are weak?

Anyone know if some mk2 diffs and stuff fit without too much hassle, thats if they are any better. my car has leaf rear, so could be no good

The other option is to sell up what i have and buy something a little more appropriate, but you know how it is when you own a car, it always seems easier at the time to play with what you have.

any suggestions welcome, cheers guys
Posts: 69
Joined: Thu Jul 26, 2007 12:55 pm
Location: Crawlorado, USA

Post by CapnCrunch »

The rear (8") diff and axles can withstand a fair amount of punishment (I've punished mine heavily) but with a 308 driving them you will stand a bit more risk of axle breakage, particularly with 35" and larger tires. I still run the original 2.6L engine in my 88 SWB and have been happy with its torque on the trail.

http://www.fivethirty.com/videos/2006JoeMBT2.avi

The front diff for your 84 is only a 7.25" diff. Fairly weak. You can swap the front diff pretty easily with a front diff from a Gen I V6 truck and you'd have an 8" front diff. I did this to be able to install a front ARB locker. The 8" front diff is much stronger.

In any case, with your engine, you'll have to regulate your use of power - especially with bigger tires - or you will likely break something.
Posts: 6
Joined: Tue Jul 10, 2007 9:07 pm
Location: Launceston Tasmania

Post by blue_vl_t »

thats the kind of info i need, thanks heaps, nice video too

any more info greatly appreciated, its hard to find anything much on the early pajeros in the way of modifications.
Posts: 199
Joined: Wed Sep 01, 2004 10:39 am

Post by PajeroSRV »

I don't suppose you have all the info on the conversion to the v8 that you could share with us? :D
Posts: 6
Joined: Tue Jul 10, 2007 9:07 pm
Location: Launceston Tasmania

Post by blue_vl_t »

i can try for you, the car had a 253 in it when i bought it, so, the 253 holden motor only comes in a trimatic patern, being it wont bolt up to a turbo350 auto, an adaptor plate was used to change from the trimatic patern to turbo patern.

The turbo350 has been used because 'marks 4wd adaptors' makes an adaptor for the holden commodore v6 and turbo 700 auto to fit into the pajero. so the rear extension housing is taken off the turbo box (weather it be a t700 or t350) and the adaptor fitted, the auto needs to be taken apart as the output shaft in the auto is changed, part of the kit i assume.
The auto will now fit up to the std transfere case.
the original gearbox crossmember seems to be just modified to suit.

When i put the 308 in, i did away with the trimatic/turbo adaptor plate, moved the engine back 15mm, redrilled the engine mounts to suit.

On engine mounts, the original holden mounts and rubbers have been used, new engine mounts have been welded to the crossmember, it looks to be a straightfoward process.

The radiator has been moved up very close to the grill and an automatic tranny cooler is fitted as well, i run a 16" davies craig thermo fan and dont have cooling issues.

the engine has a hq-hz/torana sump fitted, but has to be modified to fit around the front diff.

overall the engine fits very easily, lost of room around it to work and for the exhaust and starter moter etc, the distributer also sits away from the firewall by 60mm or so.

there are little things like, running a quicksilver shifter for the auto for easily connecting via a cable, some additional gauges, and many things i probably cannot remember.

will try and get some pics up soon, just my camera died :cry:
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