2 halfway running broncos
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Junior User
Joined: Sep 2004
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From: Tallahassee
2 halfway running broncos
make one good one... I got an 88B2 with a manual trans and an 87B2 with an auto that has a bad tranny. I want to pull the manual from the 88 and put it in the 87 to make a good nice Bronco for my lady. Anyway my question is will the driveshaft from the automatic fit behind the manual and also any tips for swapping pedal assemblies will help. Thanks.
Bronco2's rock
Bronco2's rock
Laughing Gas
Joined: Sep 2005
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The BII's are funny with some parts interchange. I'm doubting the auto driveshafts will work on a manual but just about everything else on them is a direct swap. The pedals will swap, if I remember correctly it's a bolt on deal. You might have to change some wiring as well as the computer.
Matt
Matt
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Joined: Dec 2001
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From: UT
Depends on which manual transmission is in the '88. The '87 auto is an A4LD. The FM146 and M5OD are the same length as the A4LD. You shouldn't to make any adjustments to the driveshafts. FM145 and TK transmissions are different, and would require lenghtening/shortening driveshafts.
Mountain Pass
Joined: Apr 2003
Posts: 230
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You shouldnt have any problems at all.
Being your going to manual from an auto ,the same cpmputer and all should work fine since there is no computer needed for a manual.
As far as the driveshaft?..just use the one thats was with the manual.
depending if its the FM146 or the Mazda manual,the hardest part will be the clutch line,my son has an 88 with a mazda trans and the clutch line runs down the firewall,almost a U shape over the frame and to the slave cylinder inside the trans,my 86 has the FM146 and that clutch line is simple,runs right from the firewall directly down to the trans.
Its all a pretty simple transfer,while you have the trans out i would personaly put a brand new slave cylinder and clutch kit in it while its out,oh yea..you'll have to transfer the the flywheel over with it in place of the flexplate that was for the auto
Being your going to manual from an auto ,the same cpmputer and all should work fine since there is no computer needed for a manual.
As far as the driveshaft?..just use the one thats was with the manual.
depending if its the FM146 or the Mazda manual,the hardest part will be the clutch line,my son has an 88 with a mazda trans and the clutch line runs down the firewall,almost a U shape over the frame and to the slave cylinder inside the trans,my 86 has the FM146 and that clutch line is simple,runs right from the firewall directly down to the trans.
Its all a pretty simple transfer,while you have the trans out i would personaly put a brand new slave cylinder and clutch kit in it while its out,oh yea..you'll have to transfer the the flywheel over with it in place of the flexplate that was for the auto
Posting Guru
Joined: Jul 2004
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From: Buckingham, IA
We just finished trying to put an '86 engine and manual tranny into a '90 with an auto. Things were going well until we looked at the pedal mounting under the dash. The actual mounting did seem to be a bolt-in but we started to remove the dash to get to it and it looked like more work than we had time for right now. The '86 had been rolled so no windshield and no concern about tearing the dash out but to get deep enough on the '90 was going to be quite a job. I don't think that you could access all the bolts without removing the dash but maybe a very agile person could fit under the dash better and get it done. If you do the switch, don't forget to transfer the plate on the fire wall where the clutch shaft goes through the firewall. The master cylinder is mounted on the engine side of the plate. The plate reinforces the firewall so it won't flex and crack. Good luck on the switch. Let us know how it works out.
Junior User
Joined: Mar 2007
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Farmdad, I started to do the same switch...'87 manual trans into '90 with automatic. The '87 pedal assembly is way different from the '90. I haven't been able to find 89-90 pedals yet, so I am rebuilding the auto (I'd rather have the stick). Everything else appears to be the same.
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Junior User
Joined: Sep 2004
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From: Tallahassee
All these reply's are nice. I hope to use the automatic driveshaft because I noticed it was Heavy-Duty. If the pedal assembly is like on a Mustang then i'll be able to do it without removing the dash. You just drop the steering column.
Heres another question: shoulden't I just use the manual transmission's transfer case?
Heres another question: shoulden't I just use the manual transmission's transfer case?
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Posting Guru
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From: Buckingham, IA
We used all the components from the manual tranny when we put it into the x-auto B2. Everything bolted up and there was a hole in the hump in the floor for the shifter and the transfer case lever. The '86 was a manual transfer case, '90 an electric. Our auto tranny was ok but the boy wanted a stick. Because of the pedal issue, we went back to the auto and it is working fine. We kept the transfer case and driveshafts with the transmission. The shafts were different length and connection between the manual and auto.
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