Rear driveshaft length
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From: Newport News USA
Rear driveshaft length
I know this is a stretch, but I'm trying to find the length of a stock rear driveshaft (center of u-joint cap to center of u-joint cap) that will fit into a F-150 with the following setup:
It's going into an '89, but any years that will directly match the wheel base should also work ('87-'96?)
Short bed
Regular cab
302/351
M5R2 4x4 tranny
BW-1345 T-case
Stock 8.8" rear
I'm in the final stages of converting to 4wd and all I need now is the rear driveshaft to finish it up. It's my daily driver. At the present time, I don't have the time nor the man-power to take out the 2wd tranny in there now, mock up the 4wd tranny and T-case, measure, and then pull 4wd tranny/T-case, re-install 2wd tranny only to wait possibly 2-3 weeks for the driveshaft to be finished and then rinse and repeat.
I know it's a bit of a short cut, but if I can get someone to post up the measurement of their rear driveshaft, and maybe a few other folks can echo it, I'll be pretty confident in the correct length needed.
Thanks in advance.
Luke
Edit:
If someone feels this should go in another section of the forum or thinks I can get a better answer elsewhere, please let me know. I was thinking "1987-1996" would be the best years to match my needs, and therefore the best section to post this in.
It's going into an '89, but any years that will directly match the wheel base should also work ('87-'96?)
Short bed
Regular cab
302/351
M5R2 4x4 tranny
BW-1345 T-case
Stock 8.8" rear
I'm in the final stages of converting to 4wd and all I need now is the rear driveshaft to finish it up. It's my daily driver. At the present time, I don't have the time nor the man-power to take out the 2wd tranny in there now, mock up the 4wd tranny and T-case, measure, and then pull 4wd tranny/T-case, re-install 2wd tranny only to wait possibly 2-3 weeks for the driveshaft to be finished and then rinse and repeat.
I know it's a bit of a short cut, but if I can get someone to post up the measurement of their rear driveshaft, and maybe a few other folks can echo it, I'll be pretty confident in the correct length needed.
Thanks in advance.
Luke
Edit:
If someone feels this should go in another section of the forum or thinks I can get a better answer elsewhere, please let me know. I was thinking "1987-1996" would be the best years to match my needs, and therefore the best section to post this in.
Last edited by lexluthr69; Dec 24, 2005 at 08:59 PM.
Cargo Master
Joined: Jun 2002
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From: Aurora,Colorado
Originally Posted by lexluthr69
I appreciate the response. 
Maybe someone with the same setup will come along soon.
Maybe someone with the same setup will come along soon.I will check the overall lenght of the rear driveshift from center of the ujoint caps. It is 1:15 AM and very dark and cold.I try measuring before going to work tomorrow.
Last edited by phoneman91; Dec 28, 2005 at 02:19 AM.
Thread Starter
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Senior User
Joined: Jan 2003
Posts: 383
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From: Newport News USA
Phoneman91,
I look forward to hearing what your measurement is. In a '92, I believe you have the BW 1356 T-case, but as long as it's not a slip-joint output, it should be near identical, so the measurement will still be helpful.
Thanks again!
Luke
I look forward to hearing what your measurement is.
In a '92, I believe you have the BW 1356 T-case, but as long as it's not a slip-joint output, it should be near identical, so the measurement will still be helpful. Thanks again!
Luke
Cargo Master
Joined: Jun 2002
Posts: 2,033
Likes: 32
From: Aurora,Colorado
I measured my rear drive shaft and it is 35 inches from center line of the bearing cap to bearing cap. My truck is a 92 F150 4x4 with 5.0 V8 and M5R2 and 1356 BW manual transfercase. My truck has a 117 inch wheel base and regular cab with short 6 and one half foot box.
The front end of the driveshaft is connected to a slip yoke that goes into the BW 1356 output. This front slip yoke wasnt measured in the 35 inches.
The front end of the driveshaft is connected to a slip yoke that goes into the BW 1356 output. This front slip yoke wasnt measured in the 35 inches.
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Senior User
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From: Newport News USA
Thank you Phoneman91! That would sound about right for my truck if I also had a the slip yoke rear on the t-case.
I did a very loose measurement, with the 2wd tranny still in place. Knowing that the tail housing is different between the 2wd and 4wd versions of the M5R2, I added the length of the 4wd tail housing to that of the BW 1345 t-case, measured out along an imaginary line straight out from where the tail housing meets the main case of the tranny. From the end of that imaginary line to my rear axle yoke, I got approximately 40-41 inches. So, 35" + the length of the slip yoke housing is almost right where I got measured.
Thanks again!
Luke
I did a very loose measurement, with the 2wd tranny still in place. Knowing that the tail housing is different between the 2wd and 4wd versions of the M5R2, I added the length of the 4wd tail housing to that of the BW 1345 t-case, measured out along an imaginary line straight out from where the tail housing meets the main case of the tranny. From the end of that imaginary line to my rear axle yoke, I got approximately 40-41 inches. So, 35" + the length of the slip yoke housing is almost right where I got measured.
Thanks again!
Luke
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From: Newport News USA
Now that I think about it, it really was a lot to ask for. Looking at the majority of tranny/t-case combinations, around '87/88 was when they switched over from both the T-18 to the M5R2 and from the BW1345 to the 1356. I can't say that I know of anyone else who is running the same combo as I intend to.
What is funny, is that the T-18 is considered a strong transmission in the F-150s, the M5R2 a slushbox, while the 1345 is considered weaker than the 1356 due to the 1356 having more magnesium in the case. Too bad Ford couldn't have paired up the 2 stronger ones to make a combo more reliable and less prone to failure.
Any more responses will stil be greatly appreciated. The BW1356 and 1345 are close enough in dimensions that a M5R2/1356 combo should very closely resemble that of a M5R2/1345 combo, minus the slip yoke 1356s.
What is funny, is that the T-18 is considered a strong transmission in the F-150s, the M5R2 a slushbox, while the 1345 is considered weaker than the 1356 due to the 1356 having more magnesium in the case. Too bad Ford couldn't have paired up the 2 stronger ones to make a combo more reliable and less prone to failure.
Any more responses will stil be greatly appreciated. The BW1356 and 1345 are close enough in dimensions that a M5R2/1356 combo should very closely resemble that of a M5R2/1345 combo, minus the slip yoke 1356s.
More Turbo
Joined: Jan 2008
Posts: 628
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From: in the middle of nowhere
Now that I think about it, it really was a lot to ask for. Looking at the majority of tranny/t-case combinations, around '87/88 was when they switched over from both the T-18 to the M5R2 and from the BW1345 to the 1356. I can't say that I know of anyone else who is running the same combo as I intend to.
What is funny, is that the T-18 is considered a strong transmission in the F-150s, the M5R2 a slushbox, while the 1345 is considered weaker than the 1356 due to the 1356 having more magnesium in the case. Too bad Ford couldn't have paired up the 2 stronger ones to make a combo more reliable and less prone to failure.
Any more responses will stil be greatly appreciated. The BW1356 and 1345 are close enough in dimensions that a M5R2/1356 combo should very closely resemble that of a M5R2/1345 combo, minus the slip yoke 1356s.
What is funny, is that the T-18 is considered a strong transmission in the F-150s, the M5R2 a slushbox, while the 1345 is considered weaker than the 1356 due to the 1356 having more magnesium in the case. Too bad Ford couldn't have paired up the 2 stronger ones to make a combo more reliable and less prone to failure.
Any more responses will stil be greatly appreciated. The BW1356 and 1345 are close enough in dimensions that a M5R2/1356 combo should very closely resemble that of a M5R2/1345 combo, minus the slip yoke 1356s.
I have an '89 T18 with a 1356 slip yoke . And I am looking for the stock driveshaft length in a longbox halfton. I PM'd Bill this ? , but I dont think it went through. Anybody have this combo????
3rd Gear
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measure length from front of bell housing to rear output flange on trans ,rinse n repeat on new trans n t-case together,subtract one from other from other ,subtract diference from current drive shaft length and thats your new drive shaft length,when u figure that out let me know measure ment let me know ,i might know alternative vehicles with same size unless your paying big cach for custom made
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