Outer Limits 4x4 Board

I have a standard 80 series diesel, does anybody know if the diff ratio in them is 4:11. If so, would a diff center from a landcruiser ute (diesel I think) with a 4:11 ratio interchange with my one?

Thanks.......Stuart

Not sure about the ratios, but if they are the same, the ute diff will only fit in the rear of the 80s. the front diff in the 80 is the same as a hilux.

The diff ratios between the ute diffs and the 80 wagon diffs are ever so slighty different the wagon is 4.1:1 ( 10-41 teeth ) and the utes and all the other cruisers are 4.11:1 ( 9-37 teeth ) i believe they are that way round and have a mate in a wrecking yard that has sold diffs where the customer have complained about drive line noise and found the diffs of sligtly differing ratio's to cause the noise. I personally would not have thought 0.2% difference would make any difference but has on a few occasions when he sold the wrong diffs and discovered and or realized the problem.

Wally.

Thanks for that fella's

80UTE wrote:The diff ratios between the ute diffs and the 80 wagon diffs are ever so slighty different the wagon is 4.1:1 ( 10-41 teeth ) and the utes and all the other cruisers are 4.11:1 ( 9-37 teeth ) i believe they are that way round and have a mate in a wrecking yard that has sold diffs where the customer have complained about drive line noise and found the diffs of sligtly differing ratio's to cause the noise. I personally would not have thought 0.2% difference would make any difference but has on a few occasions when he sold the wrong diffs and discovered and or realized the problem.

Wally.

Interesting. Was that vehicle a full time 4WD, Wally? I figure even differences in tyre inflation pressure can account for a similar difference in rolling radius as well.

Dave

agree with beanz, if you have new tyres front/old tyres rear you get maybe 2 - 3% difference, far more than the difference bwtween using a 4.1 and a 4.111 diff together.

maybe your mate just sold noisy diffs?

beanz2 wrote:

80UTE wrote:The diff ratios between the ute diffs and the 80 wagon diffs are ever so slighty different the wagon is 4.1:1 ( 10-41 teeth ) and the utes and all the other cruisers are 4.11:1 ( 9-37 teeth ) i believe they are that way round and have a mate in a wrecking yard that has sold diffs where the customer have complained about drive line noise and found the diffs of sligtly differing ratio's to cause the noise. I personally would not have thought 0.2% difference would make any difference but has on a few occasions when he sold the wrong diffs and discovered and or realized the problem.

Wally.

Interesting. Was that vehicle a full time 4WD, Wally? I figure even differences in tyre inflation pressure can account for a similar difference in rolling radius as well.

Dave

It was a 75 series cruiser with a front 80 diff centre that had the problem as i said it suprised me, resold the diff for an 80 and no noises. I once had 4.300 rear ratio ( 100 cruiser ) and 4.375 front ( nissan ) and thought there would be no problems with less than 2% difference and if you heard the diff noise coming you would have sworn the diff was ready to fall out and talk about wind up, fitted matching 4.375 rear centre and all was purfect again.

Wally

I run a 4.11 rear and a 4.10 front while i try not to engage on bitumen i have and they seem fine. I have 40 tranny though so can avoid the windup as I have 2/4 selector

StuartL wrote:I have a standard 80 series diesel, does anybody know if the diff ratio in them is 4:11. If so, would a diff center from a landcruiser ute (diesel I think) with a 4:11 ratio interchange with my one?

Thanks.......Stuart

75 SERIES & 80 SERIES ARE 4.11 78/79 SERIES & 100 SERIES ARE 4.3 RATIO . ALL CRUISER AFTER 1991 RUN HILUX SIZE 8" DIFF IN THE FRONT
CHEERS JOHNZ

StuartL wrote:I have a standard 80 series diesel, does anybody know if the diff ratio in them is 4:11. If so, would a diff center from a landcruiser ute (diesel I think) with a 4:11 ratio interchange with my one?

Thanks.......Stuart

75 SERIES & 80 SERIES ARE 4.11 78/79 SERIES & 100 SERIES ARE 4.3 RATIO . ALL CRUISER AFTER 1991 RUN HILUX SIZE 8" DIFF IN THE FRONT

DONT KNOW ABOUT NUMBER OF TEETH 80UTE MAY BE RIGHT IT SHOULD NOT CAUSE A PROBLEM. MY 100 SERIES IS RUNNING 4.3 ON THE REAR & 4.375 ON THE FRONT, NO PROBLEMS { PART TIME 4WD}
CHEERS JOHNZ

StuartL wrote:I have a standard 80 series diesel, does anybody know if the diff ratio in them is 4:11. If so, would a diff center from a landcruiser ute (diesel I think) with a 4:11 ratio interchange with my one?

Thanks.......Stuart

75 SERIES & 80 SERIES ARE 4.11 78/79 SERIES & 100 SERIES ARE 4.3 RATIO . ALL CRUISER AFTER 1991 RUN HILUX SIZE 8" DIFF IN THE FRONT
CHEERS JOHNZ

midi73 wrote:Not sure about the ratios, but if they are the same, the ute diff will only fit in the rear of the 80s. the front diff in the 80 is the same as a hilux.

Are the hi-lux front diffs strong? Why did they put a hi-lux diff in the front?

JOHNZ wrote:

StuartL wrote:I have a standard 80 series diesel, does anybody know if the diff ratio in them is 4:11. If so, would a diff center from a landcruiser ute (diesel I think) with a 4:11 ratio interchange with my one?

Thanks.......Stuart

75 SERIES & 80 SERIES ARE 4.11 78/79 SERIES & 100 SERIES ARE 4.3 RATIO . ALL CRUISER AFTER 1991 RUN HILUX SIZE 8" DIFF IN THE FRONT
CHEERS JOHNZ

78/79's Fac turbo , 80's and 100 fac turbo are 4.10:1
1976 on 40's, 55's, 60's, all 75's are 4.11:1
78/79's N/A Diesels, 100 N/A Diesels and 4.5 petrols are 4.3:1

Wally