C4 - Slipping and Gurgling
It slips in D and doesn't want to shift to 2 until it really warms up, then it doesn't want to go into 3, but eventually does. Reverse barely works.
So I changed the filter and fluid. Fluid mostly red/orange and some gray sludge in pan (not too bad - no shavings). I got 6 1/2 quarts out and put in about the same.
Now reverse barely engages cold and warms up to not work at all. D is about the same as before the fluid change.
There is a gurgling sound when in P and revving the engine, which sounds like it's coming from the bell housing area when inside the car. Which would indicate that it's low on fluid, but it's fine on the dipstick when warmed up.
The C4 was rebuilt as stock 3 years ago at a local trans shop.
289 probably low 300's HP / 9 inch posi 3.50. The rear end was a swap from the stock 8 about 4 months ago.
chevy runs deep, Don't step in chevy!
67 Coupe 289 - TCI C4 w/2k stall; Holley 4150 570cfm; Performer intake; mild cam; Pertronix HEI; 302 heads; Roller Tips; Hedman Tri-Y headers; H-pipe w/Flowmaster 40's; 9 in posi 3.50; 205/50-17F; 225/50-17R.