lost reverse. reggin smeggin friggin dang frickn FIXED!

was out playing today after playing with my carbs. made a few adjustments and took it to my private drag strip for a test.

Good news id that the LM1 shows i may have cured the lean spot in first when i punch it. better news is that the change to the brown accel cam and 35 squirter and purple outboard springs shows I may have picked up a whole bunch of acceleration (1/4 to a 1/2 sec through second)

bad news is that when i put it in reverse to make my second pass i get NOTHING. nada. no move. I put it in 1sr and i drive back to the shop the long way. 1st 2nd and 3rd seem fine.

no reverse.

Any clues what i broke? I have a transmission guy who'll fix me up but im wondering what i did to it. any clues?

the trans was rebuilt last year with new clutches, bands, seals, 4.2 lever, cheetah VB, hi flow filter and bolt in sprag.

BTW, its actually not a bad thing. i have a new converter, a new super sprag i want to throw in there and I'll be getting a new steel drum just for the heck of it. ive been looking for a reason to pull the 727 out so i can upgrayed it

Guesses:

Problem with the Sprague?

Reverse Band issue?

if you lost reverse and nothing else...

check rear servo...rear band strut...and rear band adjustment

i had a clue this was coming. this morning i went to a friends house he's building and parked in his driveway.

went i went to leave, i wanted to leave some rubber backing out of his new driveway. when I held the brake and gassed it, it reved up good and i thought i was leaving my marks until i backed out and saw NOTHING on the driveway. i thought "thats weird, wheres the burnout?" and I drove home and into the shop. backing out to make my test run, it backed out just fine. until after the run when i tried to back up for run #2- NOTHING.

i can feel it go in to reverse (rpms drop slightly) but no go.

70aar said it .. pull the pan and pull-down on the apply lever.

Quote:

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if you lost reverse and nothing else...

check rear servo...rear band strut...and rear band adjustment

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thats the big cludgey looking linkage in there with the small 1" by 1.5" steel plate right?

When i bought the cheetah valve body, i also bought the heavy duty retainer for the heavy duty servo spring they give you. I wonder if maybe that snap ring came out???? it was kind of a bear to get int there working under the car.

i'll check it tomorrow after checking the band adjustment