Guidance for Removal & Replacement of 4R100 transmission?? - Ford Powerstroke Diesel Forum

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post #1 of 21 Old 12-09-2011, 07:42 PM Thread Starter
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Guidance for Removal & Replacement of 4R100 transmission??

My early 99 is leaking very badly(4-5 quarts a week). I need to drop the trans and fix whatever problem there is. the only transmission i have ever dropped was a 3 speed manual from a 72 chevy c10. im not sure how to go about doing this. any online manual or a step by step guide would be great. i have a trans jack also.

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post #2 of 21 Old 12-09-2011, 08:41 PM
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You could go by a book of you can get a alldata subscription for your truck for 20 bucks a year through autozone.com.

It is pretty straight forward though remobe the starter, un hook all lines, eletrical, shift linkage, drain fluid there may be a plug in the tranny pan if not you got to loosen the pan to drain. Once the fluid is drained pull the drive shaft remove the dust shield on the bottom if tranny remove the torque converter bolts, support the tranny remove all bellhousing bolts, then remove the x member and it is ready to pull out. Installation is just the reverse of removal.
While you have the tranny out you should check the condition of the ring gear on the flywheel.
If you pull the tourque converter off the tranny make sure you reinstall properly or you can damage the oil pump in the tranny.
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post #3 of 21 Old 12-09-2011, 09:11 PM Thread Starter
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im going to school for diesel tech and we have alldata, but its winter break! oh well, where is the best place to get a new seal? (pretty sure its the front seal)
i have 3 weeks to drop it fix it and put it back in. the next project is the whole front end needs new bearings.

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post #4 of 21 Old 12-10-2011, 03:13 PM
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You can get one anywere just be carefull installing it and not nick it or bend any part of it.
I just got done with my diesel classes were I live. When we was changing my glow plugs one broke off at the treads so we had to pull the head and have it machined out.
What a fun job with out the proper chain.
I had to buy a engine chain just to get the head back in because were I went to school there are students that take the school's tools.

That front end job will be fun especially if you are doing the inside bearings too.
If you tear apart the front end make sure you keep everything in order on it's correct side that way you can put it all back in on the same side.
If you are that far "meaning inside the diff" replace the internal seals if you have a solid front axle they are prone to leak.

Last edited by mgassel; 12-10-2011 at 03:18 PM.
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post #5 of 21 Old 12-10-2011, 03:22 PM Thread Starter
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Quote:
Originally Posted by mgassel View Post
You can get one anywere just be carefull installing it and not nick it or bend any part of it.
I just got done with my diesel classes were I live. When we was changing my glow plugs one broke off at the treads so we had to pull the head and have it machined out.
What a fun job with out the proper chain.
I had to buy a engine chain just to get the head back in because were I went to school there are students that take the school's tools.

That front end job will be fun especially if you are doing the inside bearings too.
If you tear apart the front end make sure you keep everything in order on it's correct side that way you can put it all back in on the same side.
If you are that far "meaning inside the diff" replace the internal seals if you have a solid front axle they are prone to leak.
im not sure what bearings i need to replaces, the cv joint at the hub wobbles around very badly on both sides. im not sure what i need to replace besides the ujoints. ive replaced the wheel bearing in it and i can disassemble everything on the wheel hubs, but ive never done the axle shafts.

what school do you go to?

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Last edited by ZombieWeinerDog; 12-10-2011 at 03:26 PM.
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post #6 of 21 Old 12-10-2011, 03:25 PM
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i went to nadc lol
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post #7 of 21 Old 12-10-2011, 03:30 PM
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If it's leaking that bad, you should check the common motor leaks first. Which don't need a trans removal. Unless you mean the trans is leaking. You just said truck.



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post #8 of 21 Old 12-10-2011, 03:33 PM Thread Starter
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Originally Posted by jesilvas View Post
If it's leaking that bad, you should check the common motor leaks first. Which don't need a trans removal. Unless you mean the trans is leaking. You just said truck.
trans is leaking. it goes goes through 4-6 quarts a week depending how much i drive. im driving a 2001 expedition right now, i need my truck back, or im going to go crazy.

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post #9 of 21 Old 12-10-2011, 03:36 PM
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If you need to replace the front pump seal, make sure you also inspect the converter lip for grooving.damage. If any is found, either replace the converter, or get a seal saver (thin metal sleeve that slides over the converter, providing a new sealing surface)

In addition, most front seal failures are due to the pump bushing having excessive clearance. A lot of guys replace the seal only to reassemble and have the same leak. You MUST replace the bushing inside the front pump whenever doing the seal. Good luck.



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post #10 of 21 Old 12-10-2011, 03:39 PM Thread Starter
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just an fyi. One day coming home from college (130 miles) my torque converter stopped locking. i drove home with it unlocked. my leak might have something to do with that.

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