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I have a M22 Muncie 26 T and I have just installed a frest ...

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I have a M22 Muncie...
I have a M22 Muncie 26 T and I have just installed a frest engine in my 67 Chevy C10 pickup. While towing it back from Kentucky to Florida, I towed the truck wioth a tow dolly and did not remove the drive shaft. IAfter several hundred miles I noticed a loud rattling noise from the drive train. I immdiately removed the drive shaft (too late it... Read full answer
I have a M22 Muncie 26 T and I have just installed a frest engine in my 67 Chevy C10 pickup. While towing it back from Kentucky to Florida, I towed the truck wioth a tow dolly and did not remove the drive shaft. IAfter several hundred miles I noticed a loud rattling noise from the drive train. I immdiately removed the drive shaft (too late it seems) and continued to florida. The transmission appeared to be shifting properly, but the transmission remains in reverse even thought it appeared to be shifting. I have not removed the tranny from the truck yet. Do you have any thoughts on this before I go further...? Thanks, Lee
Submitted: 11 years ago.Category: Car
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Answered in 4 minutes by:
3/8/2008
Auto Mechanic: GENE, Auto Service Technician replied 11 years ago
GENE
GENE, Auto Service Technician
Category: Car
Satisfied Customers: 801
Experience: ASE MASTER TECH 40 YEARS IN THE INDUSTRY
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raising the truck up on the dolly probably has starved the bearings in the front of the transmission and welded the bearings to the main shaft-soory but this one is most likely burnt up
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Customer reply replied 11 years ago
We are in the process of removing the tranny now.

I sure hope you're wrong Gene, but you answer sure sounds like it might be right on. If it were not for stupid mistakes, life would be much more enjoyable. Hang loose and I will be back to you in an hour or so. Thanks again Gene,    Lee.
Auto Mechanic: GENE, Auto Service Technician replied 11 years ago
ok let me know-ive seen this happen before so im afraid i might be right-take the side cover off and you should see the problem
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Customer reply replied 11 years ago
Gene, If the front shaft bearings are welded to the shaft, would I still have reverse..? I can move the vehicle in reverse, but the tranny will not go out of that gear.


Lee
Auto Mechanic: GENE, Auto Service Technician replied 11 years ago
its the reverse bearings im thinking the reverse gear is welded to the reverse shaft

this might help a little

The transmission housing contains a mainshaft which passes all the way through the transmission, from the clutch to the driveshaft. This shaft is separated at one point, so that front and rear portions can turn at different speeds. Power is transmitted by a countershaft in the lower gears and in reverse. The gears of the countershaft mesh with gears on the mainshaft, allowing power to be carried from one to the other and then back again to the rear half of the mainshaft. All the countershaft gears are integral with that shaft, while several of the mainshaft gears can either rotate independently of the shaft or be locked to it. Shifting from one gear to the next causes one of the gears to be freed from rotating with the shaft, and locks another to it. Gears are locked and unlocked by internal dog clutches which slide between the center of the gear and the shaft. The forward gears usually employ synchronizers: friction members which smoothly bring gear and shaft to the same speed before the toothed dog clutches are engaged

  1. Remove the control rods from the transmission levers, and position the levers in NEUTRAL.

  2. Move the floor shift lever into NEUTRAL and insert a locating gauge into the bracket assembly (use a 5/16 in. rod on 1964 cars. For 1965-74 4-speeds use the same gauge as the 3-speed floor shift).

  3. Adjust the length of the control rods and then secure the swivels with the jam nuts and install the clevis pins.

  4. Remove the locating gauge and check the shift pattern.

1965 and later Muncie transmission levers have two control rod holes. Attaching the control rods in the lower holes will result in reduced shift lever travel and allow faster shifting, with increased shifting effort as a minor drawback.

Click image to see an enlarged view
Fig. 4: Saginaw 4-speed linkage adjustment

 

4-SPEED 1969-81

  1. Turn the ignition switch to the OFF position, except on 1970 models which should be turned to LOCK.

  2. Loosen the swivel lock nuts on the shift rods and reverse control rod. Position the transmission side cover levers to their NEUTRAL detent position.

  3. Place the floor shift in NEUTRAL and insert a locating gauge (same gauge as 3-speed floor shift) into the lever bracket assembly.

  4. Adjust all control rods swivels for easy entry into their respective levers.

  5. Tighten the shift rod locknuts and remove the gauge.

  6. Shift the lever into REVERSE and pull down slightly on the reverse rod to remove the slack. Tighten the locknut.

  7. The ignition switch should move easily into LOCK and it must not be possible to turn the key to LOCK when in any other position other than REVERSE. Readjust the reverse rod, if necessary.

  8. Check the shift pattern for correctness.

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Customer reply replied 11 years ago
Gene..., you have been a great help and I will recommend your site to anyone who needs automotive assistance. But.., let me give you another quick help solution that is out of the ordinary.., After we removed the tranny and looked for the problem, my son Jason saw the problem as we were removing the tail shaft housing. The roll pin that holds the reverse shifter fork was missing and the fork has backed itself out of the groove. After replacing the roll pin, the problem was solved. Just goes to show.., the obvious is sometimes the easiest thing to overlook.

But I do appreciate all of your professional advice and support.

Thanks again,   Lee Hopper
Auto Mechanic: GENE, Auto Service Technician replied 11 years ago
hey that great-im glad i was wrong-sometimes its a good thing huh-see ya now and good luck with it
GENE
GENE, Auto Service Technician
Category: Car
Satisfied Customers: 801
Experience: ASE MASTER TECH 40 YEARS IN THE INDUSTRY
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