Gearing 716k

All Pinzgauer drivetrain related issues
Joeri
Posts: 14
Joined: Fri Jul 05, 2019 6:52 pm

Gearing 716k

Post by Joeri » Tue Jul 16, 2019 6:52 pm

Hi
Well here it goes...i own a 716k p80 "89 civil ....now i have changed the 6 cyl for the 5 cyl tdi and the strange thing is That it seems my top speed has gone down.....110 km/u at 5000 rpms.......i think with the 6 cyl it did 125 km/u at 4800 rpms ? I have keept the original gearbox, hi/ lo case, and the rest....my axles have been overhauled together with the hi/lo case .
Now is there been deferend gearings in the 716k ( axles , hi/lo case , finel drives ?)
The engine runs great ,smooth whitout smoking black ...comes from a Volvo v70 310nm 140hp.
so what could be the thing That i've mist?

If all is Like it should be i have been thinking on adding a laycock overdrive unit behind the zf4hp22 .....it is not for the high speed but i want my rpms lower....the torq is there so i dont think That would be a problem? :mrgreen:

steve
Posts: 113
Joined: Tue Dec 11, 2018 10:57 pm

Re: Gearing 716k

Post by steve » Wed Jul 24, 2019 6:19 pm

I see your problem the drive train on Pinzgauer are all the same on the diesel models. I don't know about the petrol models

However there are 3 versions of the transfer box


1/ Version from P80

2/ Later version (same ratio as 1) used in most pinzgauers

3/ Low ratio version used in SOME 6x6 Auto (MOD & Malaysian 6 cylinder 6x6)

The 5 cylinders all use version 2, regardless of 4x4 or 6x6

So unless the transfer box has been changed to version 3 it should be fine.

If he can get any numbers off the plate on the box I can confirm,

Joeri
Posts: 14
Joined: Fri Jul 05, 2019 6:52 pm

Re: Gearing 716k

Post by Joeri » Thu Jul 25, 2019 2:36 pm

Hi thanks for the response :mrgreen:
Here is the identificationplate on my hi/lo case.

Image

steve
Posts: 113
Joined: Tue Dec 11, 2018 10:57 pm

Re: Gearing 716k

Post by steve » Fri Jul 26, 2019 6:17 pm

This version 1 (7161230010) so its an early / standard version (not the low ratio version)

Note year 1987, its from a very early P80

Joeri
Posts: 14
Joined: Fri Jul 05, 2019 6:52 pm

Re: Gearing 716k

Post by Joeri » Fri Jul 26, 2019 6:27 pm

Hi...this can be so as my 716k has vin number 0000009 and was a test truck at steyr puch in Grazz for 4 or 5 years....it was first brought on the road in 1989.
So the hi/lo case is still original ...thats good news , the diffs have been rebuild so i guess everything there is original to.
Only thing left could be the final drives but i think That there were no diferent gearings availeble .
The only Things left would be the gearbox, i have a spare one from a Volvo 760 ..mechanicle zf4hp22....mybe i swap them and see what That brings :roll:

steve
Posts: 113
Joined: Tue Dec 11, 2018 10:57 pm

Re: Gearing 716k

Post by steve » Mon Aug 05, 2019 8:11 pm

I just noticed that your engine comes out of a Volvo not sure if its the same as the VW Audi unit I would check that out

Joeri
Posts: 14
Joined: Fri Jul 05, 2019 6:52 pm

Re: Gearing 716k

Post by Joeri » Tue Aug 06, 2019 8:17 pm

Hi yes it is the D5252T engine....came out a '99 Volvo v70 , runs great , before with the 6 cyl it was Like he had to pose a bit when shifting thro the gears ( thinking what to do after shifting) . Now it shifts one after the other without even hesitating....puls from 0 up to the fourth gears as smooth as butter. Only Things is when going to the 100 km/U ( 115 km/u) the rpm gauge says its doing
4500 (4800) rpms.....i find That way to high ...i mean there is plenty of torq there so i just need to find a way to bring That down, lets say 3500rpms......would make it a bit more feul efficiënt :mrgreen:

steve
Posts: 113
Joined: Tue Dec 11, 2018 10:57 pm

Re: Gearing 716k

Post by steve » Thu Aug 08, 2019 5:38 pm

Right Ive had my thinking cap on and I assume yours is an automatic gearbox if so what torque converter did you use.

If it was the converter from the 6 cylinder engine that would be your problem I would say.

steve
Posts: 113
Joined: Tue Dec 11, 2018 10:57 pm

Re: Gearing 716k

Post by steve » Thu Aug 08, 2019 6:07 pm

The other thing I would check out is the turbo. Smaller vane turbo will give you quicker acceleration but low down top speed.

Joeri
Posts: 14
Joined: Fri Jul 05, 2019 6:52 pm

Re: Gearing 716k

Post by Joeri » Thu Aug 08, 2019 8:24 pm

Torqconvertor and automatic is the original pinz ...the one That was on the 6 cyl. So i just changed the engine al what comes after That is still original pinzgauer. The turbo is the original That was on the Volvo 5 cyl tdi...its a FGT not a VGT so notting diferend there...the only Thing i have changed on the engine is the fuelpump....as the Volvo normal uses a electronic controlled fuelpump an for me electronics and pinzgauers dont mix....(just dousnt make sense :mrgreen: ) So i had my pump rebuild so it dousnt need electronics....it is what they call a MTDI ( Mechanicle Turbo Direct Injection)....there is room for more power but then it will start to smoke black when hitting the trottle :lol:

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