hits hard going in reverse

[79scottsdale400]

hey guys i have noticed when i shift into into reverse it takes a few times for to actually shift into the gear and when it does it hits kinda hard. and when im driving while its shifting it hits too. im thinking maybe a good flush and fluid and filter change might help. what do yall think?

 

[Green79Scottsdale]

What transmission do you have?

TH400 does this also, so I will be interested what others say. Mine is like a hard clunk, and it only does it going back into reverse, not to the forward gears.

 

[79scottsdale400]

i think its a th400 im not sure and i cant find any numbers due to 30+ years of stuff build up and i ran out of brake cleaner -_- the transmission pan is square

 

[chengny]

im thinking maybe a good flush and fluid and filter change might help.what do yall think?

I think it couldn't hurt.

GM A/T pan ID chart:

 

[79scottsdale400]

Weird thing is I have to sit there for a minute goin between park and reverse before it actually does anything

 

[79scottsdale400]

it goes into all gears just not reverse or i have to shift from park to reverse a hundred times and then in finally shifts and jolts back like when you shift in drive and jolts forward. should i just get a rebuild kit by the way i found out its a th350 transmission.

 

[Konas new ride]

Have you just let the truck idle to warm up the trans to see what it does then?

 

[79scottsdale400]

i have. even did a transmission flush with trans tune. put new fluid and filter in. and still had to go back in forth between park and reverse for it to shift.

 

[Stewzer55]

Does it have a shift kit installed? Hard shifts are not necessarily bad because they help with wear on the clutches.

 

[79scottsdale400]

Not my knowledge. Honestly I might take it off and take to a transmission shop. I want a shift kit for it. I just want everything done right. It's my first project I don't wanna mess it up

 

[Stewzer55]

Wait until HRPC chimes in, he is our resident Automagic Trans guy.

 

[79scottsdale400]

Ok will do. Hopefully he can save me from a headache and spending lots of money