76 electra gear shift trouble

[mayo76]

Just had a timing chain cover gasket replace.
Drove the car home and would not shit gears.
Did not have
any problem with gears before I took it in?
Any thoughts

 

[Buick City Bert]

Just to understand, you can shift out of park, into drive? It does not shift out of first after that? Can you freely move the shifter to reverse? Back to Park?

The only transmission components near the timing cover are the cooler lines.

Probably best to start by inspecting linkage, manual control enters the drivers side of the transmission. Have someone move the shift lever while you watch.
Check the fluid per the owners manual.
Also the kick-down switch for the TH400, perhaps that got shorted, causing it to always seek passing gear.

 

[MelsRegal]

Just had a timing chain cover gasket replace.
Drove the car home and would not shit gears.
Did not have
any problem with gears before I took it in?
Any thoughts

Vacuum modulator hose is disconnected.

 

[mayo76]

good morning!!!! I will get right on that and thanks so much for the information👍👍👍👍!!!
mayo

 

[mayo76]

Just to understand, you can shift out of park, into drive? It does not shift out of first after that? Can you freely move the shifter to reverse? Back to Park?

The only transmission components near the timing cover are the cooler lines.

Probably best to start by inspecting linkage, manual control enters the drivers side of the transmission. Have someone move the shift lever while you watch.
Check the fluid per the owners manual.
Also the kick-down switch for the TH400, perhaps that got shorted, causing it to always seek passing gear.

Yes I can put it in drive and reverse
If I put it in L1 and then shift to L2 and then into drive there is no change it seems as though it is always in drive.
Fluids look good.
Kicks down after warm up.
Does not atomatic shift until I get to about 45 mph then down shifts automatically
then hauls buns.
But between 10 and 45 just wines up the rpm?

 

[MelsRegal]

Yes I can put it in drive and reverse
If I put it in L1 and then shift to L2 and then into drive there is no change it seems as though it is always in drive.
Fluids look good.
Kicks down after warm up.
Does not atomatic shift until I get to about 45 mph then down shifts automatically
then hauls buns.
But between 10 and 45 just wines up the rpm?

Did you follow the hose from the vacuum modulator on the passenger side of the transmission up to the engine and check if it is disconnected on either end?

 

[mayo76]

Did you follow the hose from the vacuum modulator on the passenger side of the transmission up to the engine and check if it is disconnected on either end?

Yes it was hangin like a loose tooth cannot believe the auto tech did not put it back on. Did it my self with the great help from the guys on this forum!!!!
Thanks
CHANGING GEARS LIKE SLICING WARM BUTTER