F150 Rear Axle Ratio

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Dan S. - 21 May 2007 19:26 GMT

How can I determine the rear axle ratio on the '89 Ford F150 4x4. It
is not on a label on the cover as someone said it should be. I have
removed the cover, should I be able to count them?

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Yours,
Dan S.

Yur welcome

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Marlin Singer - 21 May 2007 21:28 GMT

> How can I determine the rear axle ratio on the '89 Ford F150 4x4. It is
> not on a label on the cover as someone said it should be. I have
> removed the cover, should I be able to count them?

Look at the door tag. It will have an axle code like 19 or H9 (both of
these happen to be 3.55). Once you get it, you can check the codes here.

http://www.off-road.com/ford/bigbroncos/tech/ratio.html

Codes are the same between Bronco and F150.

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Dan S. - 21 May 2007 22:54 GMT

Marlin Singer was thinking very hard :

>> How can I determine the rear axle ratio on the '89 Ford F150 4x4. It is
>> not on a label on the cover as someone said it should be. I have removed
[quoted text clipped - 6 lines]
>
> Codes are the same between Bronco and F150.

Interesting. The truck looks so much more ample than the Bronco. But,
after all, it is only 6-cyl.

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Yours,
Dan S.

There is Homer, then there is Uber Homer and I intend to push the
limits.

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Spdloader - 21 May 2007 22:48 GMT

> How can I determine the rear axle ratio on the '89 Ford F150 4x4. It is
> not on a label on the cover as someone said it should be. I have removed
> the cover, should I be able to count them?

If you can count the teeth on the ring gear, AND on the pinion gear, divide
the total of the ring by the total of the pinion.

It'll probably be either a 3.08 or a 3.55 rear end, with a 3.07 or a 3.54
front.

Spdloader

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Dan S. - 21 May 2007 22:53 GMT

Spdloader used his keyboard to write :

>> How can I determine the rear axle ratio on the '89 Ford F150 4x4. It is
>> not on a label on the cover as someone said it should be. I have removed
[quoted text clipped - 14 lines]
>
> Spdloader

Thanks, all. Had it towed a few minutes ago. Changing the axle looked
easy enough, but it would be my first, and I need it sooner rather than
later.

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Yours,
Dan S.

Resident Irish fan: stated embarassment for some, hero to others,
revered by all.

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Whitelightning - 22 May 2007 01:36 GMT

>> If you can count the teeth on the ring gear, AND on the pinion gear,
>> divide the total of the ring by the total of the pinion.
[quoted text clipped - 7 lines]
> easy enough, but it would be my first, and I need it sooner rather than
> later.

Make damn sure its replaced with the correct gear ratio or kiss the transfer
case good bye.

Whitelightning

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Dan S. - 22 May 2007 01:53 GMT

on 5/21/2007, Whitelightning supposed :

>>> If you can count the teeth on the ring gear, AND on the pinion gear,
>>> divide the total of the ring by the total of the pinion.
[quoted text clipped - 17 lines]
>
> Whitelightning

So, I've got a question, though. Why did the fluid pour out of it
after that loud cracking sound. When I opened it, I couldn't see what
would have been holding in all of that fluid in the first place.

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Yours,
Dan S.

Resident Irish fan: stated embarassment for some, hero to others,
revered by all.

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David M - 22 May 2007 02:57 GMT

> So, I've got a question, though. Why did the fluid pour out of it
> after that loud cracking sound. When I opened it, I couldn't see what
> would have been holding in all of that fluid in the first place.

Ummm....you took the rear cover off and are wondering why the fluid came
out? What did you expect to happen?

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David M (dmacchiarolo)
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Dan S. - 22 May 2007 03:05 GMT

It happens that David M formulated :

>> So, I've got a question, though. Why did the fluid pour out of it
>> after that loud cracking sound. When I opened it, I couldn't see what
>> would have been holding in all of that fluid in the first place.
>
> Ummm....you took the rear cover off and are wondering why the fluid came
> out? What did you expect to happen?

No. It came pouring out from the bolted cover after, apparently, the
rear end borked. It didn't even leak before the darned thing locked up
on me.

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Yours,
Dan S.

Rightee tightee, leftee loosee, right?

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Dan S. - 22 May 2007 03:14 GMT

Dan S. submitted this idea :

> It happens that David M formulated :
>>
[quoted text clipped - 7 lines]
> No. It came pouring out from the bolted cover after, apparently, the rear
> end borked. It didn't even leak before the darned thing locked up on me.

OK. Maybe I'm answering my own question here. But, there wasn't a
gasket between the housing and the cover. Maybe something from inside
hit the cover knocking it loose. I just don't know how it could have
held the fluid before without a gasket of some sort.

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Yours,
Dan S.

There is Homer, then there is Uber Homer and I intend to push the
limits.

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Steve Barker - 22 May 2007 07:00 GMT

> How can I determine the rear axle ratio on the '89 Ford F150 4x4. It
> is not on a label on the cover as someone said it should be. I have
> removed the cover, should I be able to count them?

There's not a tag on either differential?

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Steve Barker

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