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Author Topic: High Pinion Front diff  (Read 4630 times)

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zukjunkie13

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High Pinion Front diff
« on: Feb 26, 2008, 10:33:36 PM »
Has anyone had any problems running the high pinion front diff? cause ive heard they are weak, but not sure if its true. I plan on running 37s on the new buggy and wonder if the high pinion is too weak.
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WHITE_TRASH

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Re: High Pinion Front diff
« Reply #1 on: Feb 26, 2008, 10:42:12 PM »
The low pinion (standard rear and solid axle front) diffs are weak when used in the front when the rig is going forward because the way the gears are cut.  Gears have a drive and coast side.  The drive side is much stronger so it works great in the back.  When you put a low pinion in the front it is on the coast side of the gears which is by many estimates at least 20% weaker as a front vs as a rear.

The high pinion is much stronger when going forward than the low pinion for just the opposite reasons as the low pinion.  The only time a HP is weakish is going backwards which runs the gears on the coast side. 
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jimbo74

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Re: High Pinion Front diff
« Reply #2 on: Feb 26, 2008, 10:44:05 PM »
so basically WT is saying a HP up front kicks :moon:
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WHITE_TRASH

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Re: High Pinion Front diff
« Reply #3 on: Feb 26, 2008, 10:46:03 PM »
Thats why I run one...  ;)
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zukjunkie13 [OP]

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Re: High Pinion Front diff
« Reply #4 on: Feb 26, 2008, 10:47:35 PM »
Ok cool!!!!!!


Thanks for the information!
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Toymin8r

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Re: High Pinion Front diff
« Reply #5 on: Feb 27, 2008, 01:44:38 AM »
You should be fine.
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jaywross

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Re: High Pinion Front diff
« Reply #6 on: May 20, 2008, 08:59:49 PM »
does my stock 95 toyota pickup have 'low' pinion/normal...whats high pinion?
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Re: High Pinion Front diff
« Reply #7 on: May 20, 2008, 09:04:30 PM »
Quote from: WHITE_TRASH on Feb 26, 2008, 10:46:03 PM
Thats why I run one...  ;)
Ditto!!!!!!!!!!!!!!!!!!!!!!!!!!11111
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Re: High Pinion Front diff
« Reply #8 on: May 20, 2008, 09:09:12 PM »
Quote from: jaywross on May 20, 2008, 08:59:49 PM
does my stock 95 toyota pickup have 'low' pinion/normal...whats high pinion?

It has a lo-pinion.

High Pinion



Lo-Pinion

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Slolyfe

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Re: High Pinion Front diff
« Reply #9 on: Jun 02, 2008, 03:10:00 PM »
Does anyone know when installing a high pinion front end how much you would need to shorten your drive shaft? how much distance do you loose between the tcase flange vs the pinion flange?
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welder2000

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Re: High Pinion Front diff
« Reply #10 on: Jun 02, 2008, 08:59:01 PM »
Which trucks can you find the high pinion in.
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jaywross

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Re: High Pinion Front diff
« Reply #11 on: Jun 02, 2008, 11:15:07 PM »
is it really that much of an advantage to have a high pinion?
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Re: High Pinion Front diff
« Reply #12 on: Jun 03, 2008, 05:24:19 AM »
Quote from: jaywross on Jun 02, 2008, 11:15:07 PM
is it really that much of an advantage to have a high pinion?
YES.... besides the strength of the gears ...your driveshaft is up and out of the rocks...and also your pinion angle is usually 10x better
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Toymin8r

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Re: High Pinion Front diff
« Reply #13 on: Jun 03, 2008, 05:51:15 AM »
Quote from: welder2000 on Jun 02, 2008, 08:59:01 PM
Which trucks can you find the high pinion in.

91-97 Toyota FJ80 Landcruisers are the only trucks they came in.

Quote from: slolyfe on Jun 02, 2008, 03:10:00 PM
Does anyone know when installing a high pinion front end how much you would need to shorten your drive shaft? how much distance do you loose between the tcase flange vs the pinion flange?

I shortened mine about 1 inch.
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YOU ONLY NEED TWO TOOLS IN LIFE - WD-40 AND DUCT TAPE. IF IT DOESN'T MOVE
AND SHOULD, USE THE WD-40. IF IT SHOULDN'T MOVE AND DOES, USE THE DUCT TAPE.

IF YOU CAN'T FIX IT WITH A HAMMER, YOU HAVE AN ELECTRICAL PROBLEM.


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BeccaLoo24 – i can toss grown men.... so dont doubt me

welder2000

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Re: High Pinion Front diff
« Reply #14 on: Jun 03, 2008, 08:40:55 PM »
Thanks.
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83 toy Clovis, CA

hi on lux

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Re: High Pinion Front diff
« Reply #15 on: Jun 04, 2008, 04:02:33 AM »
i believe a high pinion 3rd member has an 8" r & p gears, will a toy 8 diff from low pinions fit into a high pinion?  arb's, lockrights, detroit lockers/truetracs, no-slips(powertrax)
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Slolyfe

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Re: High Pinion Front diff
« Reply #16 on: Jun 04, 2008, 07:10:13 AM »
Yea it fits you just need an additional bearing kit that marlin sells for 43 bucks
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DieselD

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Re: High Pinion Front diff
« Reply #17 on: Jun 04, 2008, 08:02:50 AM »
running my hp on 38s and its been great so far. way better being up and out of the rocks.
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