4wd binds up
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Joined: Oct 2003
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4wd binds up
Ok... The long and short of it.
1990 F150 extended cab 4x4, AOD tranny manual lock hubs, manual select 4x4, 6in lift, 305 70r 16's.
2hi, hubs free, everything works great.
4hi, hubs free, front drive line and both axles turn without any binding.
4hi, hubs locked, truck acts like the front brakes are locked up and the rear wheels spin as the fronts just creep. Let off accelerator and truck stops.
We put the truck up on jacks and did the drive line/tire test.... back wa 3.5 revolutions of the driveline to 1 tire. Front was 2.75/1
Here are the numbers off of the housings:
Front 620804 casted on pumpkin... tag 610335-4 09 E9TA
Should be a Dana 44 with 3.54 gears, right.
Back FOTW4025AA casted in. and also 0036. No tag on it.
Should be a 8.8" rear end for a 1990. Gear ratio???
Took the hubs apart and they were PACKED full of grease!!! Cleaned them.
I guess what my question or statement is... By the numbers I found I could only determine that the front was a Dana 44 high pinion supposedly with 3.54 gears, but the driveline/tire test say otherwise. And I have never heard of 2.75 in a front Dana. For the rear the next step is to take off the cover and count teeth. Oh and here is one other tid-bit... The door tag reads H5 for axle, looking this up, the axle should be a 4.10...HELP!!!!! Sons truck and we are headed to Pismo this weekend. Thanks.
1990 F150 extended cab 4x4, AOD tranny manual lock hubs, manual select 4x4, 6in lift, 305 70r 16's.
2hi, hubs free, everything works great.
4hi, hubs free, front drive line and both axles turn without any binding.
4hi, hubs locked, truck acts like the front brakes are locked up and the rear wheels spin as the fronts just creep. Let off accelerator and truck stops.
We put the truck up on jacks and did the drive line/tire test.... back wa 3.5 revolutions of the driveline to 1 tire. Front was 2.75/1
Here are the numbers off of the housings:
Front 620804 casted on pumpkin... tag 610335-4 09 E9TA
Should be a Dana 44 with 3.54 gears, right.
Back FOTW4025AA casted in. and also 0036. No tag on it.
Should be a 8.8" rear end for a 1990. Gear ratio???
Took the hubs apart and they were PACKED full of grease!!! Cleaned them.
I guess what my question or statement is... By the numbers I found I could only determine that the front was a Dana 44 high pinion supposedly with 3.54 gears, but the driveline/tire test say otherwise. And I have never heard of 2.75 in a front Dana. For the rear the next step is to take off the cover and count teeth. Oh and here is one other tid-bit... The door tag reads H5 for axle, looking this up, the axle should be a 4.10...HELP!!!!! Sons truck and we are headed to Pismo this weekend. Thanks.
Elder User
Joined: Feb 2004
Posts: 909
Likes: 9
From: San Luis Obispo, CA
I don't think you will get this fixed before the weekend.
I think you can only pick the ratio you want and change out the other one. If neither is acceptable, then you need to change out both sets @ twice the expense. It really does not matter what the tags say - someone must have made changes without doing their homework.
Before you count teeth, I would turn the tires 10 turns and count the driveshaft (D/S) revolutions. Chalk the tires & D/S - have one person turn the tires and another count the D/S revs. Divide the D/S revs by 10 to get the ratio. This will give you much more accuracy. It is as good as counting teeth and not as messy.
(Actually I like to leave one tire on the ground and turn the other 20 turns. This eliminates any errors rom having one wheel hang up and not turn with the other all the time. A LS will eliminate this problem, but with an open differential, there could be an error. Because of differential action, 20 turns of one wheel = 10 turns of both. You still divide by 10 to get the final ratio.)
I think you can only pick the ratio you want and change out the other one. If neither is acceptable, then you need to change out both sets @ twice the expense. It really does not matter what the tags say - someone must have made changes without doing their homework.
Before you count teeth, I would turn the tires 10 turns and count the driveshaft (D/S) revolutions. Chalk the tires & D/S - have one person turn the tires and another count the D/S revs. Divide the D/S revs by 10 to get the ratio. This will give you much more accuracy. It is as good as counting teeth and not as messy.
(Actually I like to leave one tire on the ground and turn the other 20 turns. This eliminates any errors rom having one wheel hang up and not turn with the other all the time. A LS will eliminate this problem, but with an open differential, there could be an error. Because of differential action, 20 turns of one wheel = 10 turns of both. You still divide by 10 to get the final ratio.)
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