M50D repair Question

[1973 F-100 4x4]

How hard is it to change the shift fork in a '95 M50D 5 Spd manual tranny?
Are any special tools needed?

 

[blacksnapon]

How hard is it to change the shift fork in a '95 M50D 5 Spd manual tranny?
Are any special tools needed?

Transmission
SPECIAL SERVICE TOOL(S) REQUIRED Description Tool Number
Remover/Replacer Tube T57L-7025-B
TOD Forcing Screw T84T-7025-B
Bearing Puller T77J-7025-H


Remove transmission (7003) from vehicle as outlined in this section. Secure to an appropriate holding fixture.

M5OD Transmission Assembly





Remove shift control selector lever and housing and gearshift lever boot if necessary.
Using a 12mm wrench, remove 10 retaining bolts. Remove case cover.
Remove and discard extension housing seal (4x2 vehicles only).
Remove extension housing (7A039) from case, refer to Extension Housing Removal in this section.
Remove countershaft rear bearing and thrust washer.
Using Mainshaft Locknut Wrench T88T-7025-AR and Remover Tube T75L-7025-B, remove and discard locknut from output and fifth gear driveshaft.




Using a 17mm wrench, remove holding bolt from reverse idler gear shaft (7140). Remove reverse idler gear assembly by grasping and pulling rearward.




Item Part Number Description
1 7061 Output Shaft
2 7214 Bolt
3 7N037 Thrust Washer with Tang
4 7141 Reverse Idler Gear and Bushing
5 7156 Retaining Ring
6 7140 Reverse Idler Gear Shaft

CAUTION: Make sure tools are properly positioned so as not to damage parts being removed.

Remove output shaft bearing (7065) from output shaft using Remover/Replacer Tube T75L-7025-B, TOD Forcing Screw T84T-7025-B and Bearing Puller T77J-7025-H.




Item Part Number Description
1 T75L-7025-B Remover/Replacer Tube
2 T77J-7025-H Bearing Puller
3 7R205 Output Shaft Rear Bearing
4 T84T-7025-B Tod Forcing Screw

Using a brass drift and hammer, drive reverse idler gear and bushing from output shaft.




Remove sleeve from output shaft.
Remove countershaft reverse gear with two reverse idler gear bearings and reverse synchronizer blocking ring (7107).

Transmission, Rear Housing





Item Part Number Description
1 7B364 Locknut
2 7R205 Output Shaft Rear Bearing
3 7142 Output Shaft Reverse Gear
4 7072 Spacer or Sleeve
5 7141 Reverse Idler Gear and Bushing
6 7085 Bearing Retainer
7 7K179 Reverse Idler Gear Holding Bolt
8 99796-0612 Bolt
9 7214 Fifth and Reverse Shift Rod Bolt
10 99611-2000 Ball
11 7173 Input Bearing Spacer
12 7112 Fifth Gear
13 7R130 Needle Bearing, Fifth Gear
14 7142 Fifth Gear, Countershaft
15 7107 Synchronizer Blocking Ring
16 7124 Synchronizer
17 7107 Synchronizer Blocking Ring
18 7R482 Synchronizer Split Washer
19 7C340 Thrust Washer
20 7N040 Countershaft Reverse Gear
21 7L324 Thrust Washer
22 7N170 Locknut
23 7D283 Countershaft Rear Bearing
24 7N270 Needle Beaming
25 7289 Lockball (Steel) Shift Rail
26 99796-0612 Bolt
27 7289 Shift Ford (5th and Reverse)

Remove thrust washer and split washer from countershaft.
Using a 12mm wrench, remove holding bolt from reverse gear shift rail (7240).
Remove the fifth/reverse synchronizer and fifth/reverse gear shifter fork (7230) as an assembly without separating the steel ball and shifter interlock spring (7234) (removed from shift fork groove) unless necessary.
Remove fifth gear synchronizer blocking ring.
NOTE: Do not remove the Torx® nut retaining the shift lever connecting pin at this time.

Remove the lockplate retaining bolt and inner circlip. Remove fifth and reverse shift lever from transmission case.
Remove fifth gear (counter) with needle bearing.
NOTE: For reference during assembly, observe that the longer of the two collars on fifth gear faces forward.

Remove fifth gear from output shaft using Bearing Collet Sleeve for 3.5-inch Bearing Collets T75L-7025-G, Remover/Replacer Tube T85T-7025-A, TOD Forcing Screw T84T-7025-B and Gear Removal Collet T88T-7061-A.




Remove fifth gear spacer or sleeve and (positioning) ball.
Remove front and rear bearing retainers. Refer to procedures in this section.
Using a 10mm socket, remove oil trough retaining bolt and oil trough from upper transmission case.




Item Part Number Description
1 7052 Center Bearing Outer Race
2 7111 Countershaft
3 7D283 Countershaft Rear Bearing
4 7A174 Oil Bypass Tube
5 99796-0620 Bolt
6 99796-0825 Bolt
7 7050 Main Drive Gear Bearing Retainer
8 7065 Output Shaft Bearing
9 7052 Bearing
10 7017 Input Shaft
11 7061 Output and Fifth Gear Driveshaft

Pull input shaft (7017) forward and remove bearing (7025). Pull input shaft rearward.
Pull input shaft forward and separate it from output shaft. Incline output shaft upward and lift it from case (7005).




Remove input shaft from case.




Remove countershaft through upper opening of case.

 

[1973 F-100 4x4]

All of that just to change out a bent shift fork? Yikes!!!
The local transmission shop said that it would only take half an hour for them to change it out, but at $550, it's a bit more than my friend would like to spend.

Do you have any pictures, or diagrams that show this procedure?
Or perhaps an exploded view of the components?

The transmission is in a '95 F-150 4x4.

Thanxs in advance.

 

[d-kuzmen]

Accually it's fairly easy to change a fork, once you get the tranny out, you unbolt the top cover and the forks come right out as an assembly, then it's just a matter of getting to the one you need to change. The hardest part of the job is pulling the tranny out.

 

[blacksnapon]

That procedure is to completely dissassemble the trans.

 

[1973 F-100 4x4]

Don't need to completely disassemble the tranny, just need to change out the shift fork for reverse.
The PO of the truck bent the shift fork forcing it into reverse, so now it has to be held in reverse or it pops out.
If anyone has a diagram of this tranny, I could definently use it for this.
Also, the tranny is already out. Helped him pull it last weekend.
Thanxs in advance.

 

[blacksnapon]

Its pretty much unbolt the top, drive out some roll pins, move the larger pins, replace the fork, then put it all back together.

 

[1973 F-100 4x4]

Ok, not too bad then.
Thanks for the help guys, it's greatly appreciated!!