Buick Repair Questions? Ask a Mechanic for Answers ASAP
Is the check engine light on when the engine is running?
no check engine light
Is there a light on the dash that says o/d off?
just wont go into final gear
bought it this way
The lock up converter shouldnot engage till it is in 4th gear
well I had a guy tell be to drive it then hit the brake and the gas at the same time.
So I did and u can here the convter unlock or somthing like that
You would not hear the converter lock up or unlock.
I know a little bite about transmissions just have no clue on this one
Does the car have a tach?
you can see it in the RPM's
when the converter is locked the rpm wont jump up like it does when it cold
as soon as it warms up it will lock
runs 2800 at 70mph
when you are at 50 mph can you drop the shifter into 3rd gaer and the tach come up in rpms with out changing the pressure on the gas pedal?
wont change a bit
if you are going 50 mph and do not move off of the gas pedal and lightly touch the brake pedal do the rpms go up or down
just enough pressure on the brake pedal to turn on the brake lights but not hard enough to apply the brakes
they go up
how far up
just like my truck with the Allison
At 70 mph andin 4th gear the rpms would be around 2600
when a converter is lock the engine will not free rev.
so 2800 is about right
its almost 3000 grand on the interstate
that is true only if the clutches in the trans are holding correctly.
its not in 4th gear
I was told when i bought it it dont go into 4th gear.
Ok try this and lets see what the trans will do. find a straight section of road
ButI need to know what ithe trans is and is not doing
been driving it this way for like 1.5 years
I can take a Video when I get home and the post it or send it to u
start off in manule low 1 and get up to 20 mph and shift to 2nd with out changing pressure on the gas pedal. When the speed gets up to 30 mph shift to 3rd. and at 50 shift to 4th
u can manually shift it through the gears
let me know if you have a drop in rmp for all 4 shifts.
wont drop in D
1 2 3 D
then get up to 60 and let off of the gas pedal slightly and see if the trans will slow you down
the shifter will not gointo D
1 raaaaa 2 raaaa 3 raaaa 4 nota
the shifter will go into D but the trans wont
if you are going 70 mph and slightly let off of the gas pedal does it fell like the brakes where applied?
it will slow u down yes and if you put it drive the rpm's will drop all the way down but no gear but if you leave it in 3rd the rpm's will stay high till you loose speed
just have the cash for a new/used trans
It a very nice SUV just needs this issue fixed
this will not be a shift solenoid problem. If it where you would get a code for it.
the problme is going to be inthe clutches for 4th gear them self.
Well should I drop the pan
i am suprized you are not getting a gear ratio error code now
change the fluid? Can u find out if this is a common issue?
Yes drop the pan and see what is in the bottomof the pan
It wouls if it was a speed sensor
i do not have to find out. I am a trans rebuilder and I see it all the time
If a speed sensor was bad you would get a codefor it
Well I built my Allison 1000
allisons are much like a th400 trans
this is a Pain in the ass
the 4t60 and 65e transmissions are a little bit harder but not that bad
A pain to get out with out a lift and it's AWD
More parts and smaller parts at that
You said that right. I hate the awd
I would take it out if i knew step by step LOL
I do all of my own stuff. Just this one is a pain. Wife loves the SUV
If you have not pulled one you are best to leave it to a trans shop. i will not even pull the awd out of the front wheel drive gms
could I drop the pan and test the om's on the
The solenoids are behind the side pan not the bottom pan
We had that issue on our Saturn
could it be the 4th gear clutch pack then
You have to almost drop the trans to get to the solenoids
that is what i amthinking
you would think it would still go into 4th but slip
but it dont even do that
What i think has happened is the 4th gear clutch hup has stripped or broken off
thats I think it the solenoids
Did a light bulb go on
and it will still shift fine in the rest of gears?
most trans use more than one clutch pack per gear
If it does not drive you crazy not going into od then i would just drive it till something eles goes wrong with it
yea we have
True but i have had alot of trouble with the clutch hubs stripping off
we dont drive it to work. Its just nice to haul the kids in. Lost of room
If I got a used trans what years would work?
1 in 15 4l60e transmissions do not have top have a new clutch hub when i rebuild them
would the trans go out the bottom or engine need to come out too?
9 of the 14 have striped out already
The trans can be pulled with the engine left in the van
i have a " MINI PICK' That i use to hold the engine in so all i have to pull is the trans
you think I could tackle it?
you dont know me LOL
I have a engine lift, trans jack
all the tools
As long as you listen to what i tell you to get you should be able to do the job if you rebuilt your allison
Should I rebuild it or buy a used one that could go out later down the road
HMMMM SPend $900 on a used unit or $500 for parts and rebuild it
I will know as soon as I open it up right?
ButI wuld get all my parts from www.transtar1.com
You will have to pull the chanel plate off, pull the od clutches and slide the clutch hub out and look at the spline at the base of the hub and see if the spline oes all the way to the tip if the hub
This is a 4T65E right
If there is 1/4 inch of no spline at the tip then the hub is garbage
yes it should be a 65e
diffrent if it's AWD?
no same hub
Is that it then
The non awd is the same trans as the awd gust has a differant nose on the passanger side axle housing
You will want to get a trans go shift kit to install in this trasn when you decide to rebuild it. The kit is great and willmake the rebuild last much longer and you will love the way the trans performs after wards
290.00 for the kit
And no it is not like the B&M shift kits for a 350
I know I got a Full Trans go in the Allison
You need to replace the converter too.
atsg has a great book for this trans and is a must "even for a vet" to have handy for small details like torque specs
the book is $20.00
As i said $500 for a rebiuld is not bad
you have to add trans fluid to that to and a new band
nope not if it's right when it's done
Pkus a clutch hub
With a trans go kit and good parts it is well worth the time and money. A good rebuilt unit will save all the mony you spend in gas miage savings
yea it suck on gas
So now how do you get paid?
just hit the accept button
or are you asking what percentage do i get?
the question is worth $16 and i get half of that
Cool Thanks man