adjusting MUNCIE SHIFTER LINKAGE

grumpyvette

Administrator
Staff member
adjusting a shifter correctly is a bit like SEX, experience and constant PRACTICE HELPS, if your local to palm beach Florida Id be happy to help you out, if not get a SHOP MANUAL and read it, before you start, basically you disconnect the linkage bars at the transmission lever ends and set the levers in the shifter so they line up at the neutral gate,this is done by moving the lever to the middle or central of the three locations it can be moved to, as you push it forward and back-ward ,adjust the trans levers to central and then adjust the linkage rods length to slip into those linkage lever holes, without binding even slightly, youll find this approach fast and easy with EXPERIENCE AND PRACTICE, those help but having a shop manuals a big plus.
I will point out that swapping to a HURST competition plus shifter is a good option, as its built more solidly and rigid and generally improves the shift quality.

http://garage.grumpysperformance.co...lder-shifter-thats-a-p-i-t-a.7849/#post-27082

http://garage.grumpysperformance.co...t-my-hurst-four-speed-shifter.2936/#post-7698

1968vts1.jpg

linkagearm.jpg

some linkage levers and rods require a collar and almost all have snap lock pins to hold them in position, once adjusted
cleaning the contact surfaces, and oiling them a bit helps, bushings may need to be replaced as they wear over time.
fresh manual synthetic trans oil in the transmission tends to help a bit also, if you have not changed out the manual trans oil in the last 40K Id suggest you do so!
your newer corvettes can have similar manual linkage or internal shifter mechanisms, HAVING A SHOP MANUAL FOR YOUR YEAR CORVETTE IS A HUGE HELP

yes read thru the sub links
https://www.corvettemods.com/C3-Cor...r-Rebuild-Kit--Manual-Automatic-_p_15089.html

http://reviews.ebay.com/Adjusting-Munci ... 0002115622

"The basics of this adjustment are:
Attach the levers to the transmission and shift them to neutral.
Attach the mechanism to the tailshaft housing, different position for Nova (two spacers required) Chevelle (no extra parts required) and Impala (mounting plate required). Use a gauge to position the mechanism into neutral and keep it there.
Adjust rods to fit this neutral position. Tighten everything up and test the shifting.

Below is the procedure as it relates to the diagram. You will find this procedure in any GM shop manual for 64-67.

1. Attach the transmission levers (M),(P)and(S) to the transmission and set to neutral. Attach shifter mechanism to tail shaft housing.
2. Move shifter (A) to neutral position and insert locating gauge (B) in control lever bracket assembly slot. NOTE: make your own gauge. dimensions are 1/8 inch thick x 41/64 inches wide (0.646) x 3 inches long.
3. Install rod (V) with clip on lever (D), this is the 1-2 rod.
4. Maintaining lever (D) against locating gauge, adjust clevis(T) at lever (S) until clevis pin freely passes through holes in clevis and lever.
5. Install clevis pin, and cotter pin, there may be a washer here as well.
6. Install rod (H) with retainer on lever (W). this is the reverse rod.
7. With jam nuts (J) and (L) and swivel (K) loose on the rod (H) insert and attach swivel with washer and clip to lever (M).
8. Maintaining lever (W) against locating gauge (B) Then tighten jam nut (L) against swivel.
9.Install rod (R) with clip on lever (P).
10. With jam nuts (E) and (G) and swivel (F) loose on the rod (R), insert and attach swivel with clip to lever (C).
11. Maintaining lever (C) against locating gauge (B), and while holding swivel (F), run jam nut (G) against swivel until nut contacts swivel. Then tighten jam nut (E) against swivel.
12.Remove locating gauge and check shifts to ensure proper operation. Readjust clevis and swivels if necessary.

NOTE: Control rods may be attached to transmission shift lever lower holes to reduce shift lever travel, for a 'faster shift' adjustment option (1966-1967). Increased shifting effort is required when control rods are installed in this 'short throw' position. "

http://www.corvettemagazine.com/technic ... les/c2/56/

http://www.automedia.com/4-Speed_Shifte ... 060801st/1

http://www.mackstrans.com/MuncieSuperCase.html

http://books.google.com/books?id=1Ti3kH ... q=&f=false

http://www.digitalcorvettes.com/forums/ ... 1214568163

http://www.digitalcorvettes.com/forums/ ... 1214693492

http://www.ecklers.com/search.asp?actio ... chHistory=

http://www.carcraft.com/techarticles/11 ... index.html

viewtopic.php?f=45&t=396&p=6033#p6033

viewtopic.php?f=71&t=447

Muncie-SuperCase.jpg

asking why some 15-30 year old trans won,t shift smooth as hot greased glass..on ice,..well,
that questions a bit vague,finding the answers bound to require knowing just how worn, or bent or lubricated, or dirty and to what degree are things LOOSE, mis-aligned, etc
yes having the reverse lock out a bit out of adjustment is bound to be a problem, but in most cases thats very minor and easily fixed, again a shop manual and a good cleaning and verifying the manual trans fluids SYNTHETIC lube is at the correct level will sure help, dis assembly of the trans and internal parts replacement MIGHT be necessary, Ive seen lot of those transmissions that were VERY LOW on lube so check that carefully
having a transmission with only a bit of the 15-30 year old oil in it is bound to be a bit rougher to shift than one loaded with new clean lube, up to its intended fill level
 
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