kevo2k6

does anyone have a picture of a tranny mount or a way to describe what it looks like to me? i bought a new one today from autozone because when i start off i get a loud clunk. its an auto trans. the problem is the one i got form autozone doesnt look quite right. so any help would be appreciated.

Project: 85 2.8 bird

kevo2k6

ok well what i have circled in red is that the actual mount and what is circled in blue like a bushing? because i think i received what was circled in blue. and if so is this what is causing the clunk to happen when accelerating? i also get the same clunk sometimes when the tranny is shifting in wot and the shifter will actually pop up a little bit.

THEGENERAL

by the tail shaft of the tranny in the pic above with a stud going thru the cross member and two bolts holding it to the transmission pretty simple to change...

Ovrclck350

The blue is the mount. They break in half real easy. That's what causes the clunk.

kevo2k6

ok thank you that picture u posted is exactly what i needed to see. thanks.

THEGENERAL

yes they do i just changed the one in my pickup and it looked just about like the on in the pic above...LMAO they are not the strongest in the world when you get the rubber ones ive ever seen them break the next day after putting them in new.....

your best bet is to foot the extra bucks and put in a poly mount and be done with it

305q_ta86

iTrader: (1)

Yep. poly mount for sure. It's real easy to change. I was all ready to take off the whole crossmember to do it, and then I checked my repair manual just to be sure, and lo and behold, all I had to do was put a board under the pan, undo the bolt, jack the tranny up a bit, bada bing bada boom done in 5 minutes with an impact wrench.

Project: 85 2.8 bird

fwiw, that is a polymount

Ovrclck350

I actually UNinstalled my Poly.

Too much vibration.

Project: 85 2.8 bird

thught of something...did you install that plate that is on top of the mount, between it & the tranny? just wondering.

Ovrclck350

Me? Yes.

Project: 85 2.8 bird

no, kevo2k6. but then, I'm not sure if stock replacements have that plate or not.

KED85

Have many rags available.
Take it easy on tranny due to aluminum tailshaft. Only need to lift the tranny end just enough, no need to use lift & move mountains.

Very dirty greasy job.
15mm bolts, too.

Raise car from back to access mount easier.

Overclock your vehicle had excessive tranny vibrations due to poly mount bushing?
First complaint I ever heard on that detail.
Rubber ones go for $7 or so.
But Poly is $35 or so, right?

Ovrclck350

Yup...poly bushings have a lot more vibration. I originally took it out trying to locate a 70+MPH vibration, but it's more comfortable now at all speeds. Honestly I've had this rubber one in for quite a while and it hasn't broke yet.

It's behind a 305TPI, not a V6.

KED85

Your convert, Right?
THANKS Ovrclk350!
Yeah I've been running my swap meet $7 bushing for a bit too.
The oil leaks wear the rubber ones out much quicker along with right foot/power braking action.
Part of the fun
One of the dirtiest greasiest jobs is replacing that mount.
Takes longer to set car up in air securely than changing it!
Cheaters way to attack is set car on driveway entrance incline & squeeze under to reach & swap out bushing.

FAST RS

KED85 i paid 25.00 for mine jsut think in the longrun you will save money since mine has not broke and you will also save time by not haveing to change it. I opt for the extra 15.00.

KED85

I gotta say for $7, my solution was a perfect choice.
For the Corvette, Poly Tranny Bushing was ONLY choice!
I'd do same again when I start to hit the swap meets again one day.
With mor secure engine mounts under the hood, rubber is fine working option.
Just know going in, ya gonna get really greasey!
And Women love it when ya hug them with greasey arms! LOL!!

kevo2k6

got the new mount in. no more "clunk". had to take off the cross member to do it though cuz i couldnt get enoguh leverage on one of the bolts from the mount to the tranny. now does anyone have a picture of wat the poly mount looks like because i mite be interested in that due to the fact that i brake stand waaaaaay more than i need to. will a poly mount hold up better to this as well?

KED85

See the pic in this thread!
And the pic, the mount is assmebled on car, 100% correct.
That extra plate MUST be used.
Bummer ya had the extra work on cross member removal.

FAST RS

I had to remove my crossmember but it was a pain becasue the poly mount didnt line up correct and i had to make it fit. I had the same problem with it on my 68 Firebird with ES.

KED85

Try POLY MOTOR MOUNTS FOR FUN!!!!!
Double the fun because of NEW Grade 8 Bolts for the project!
Oh the joys!

FAST RS

I wish they made a poly mount for my firebird i searched high and low but no one makes them in the style i needed. I had a hardenouth time finding them in rubber even with the partnumber from an old recipt i found. Im gonna have fun with a good old torq strap.

KED85

On my 1986 Firebird 400.
I went thru motor mounts like every other month.
Back in 1981/82 I probably used up the stock you seached for.
Torque strap is a CHAIN and grade 8 bolts. Chain attaches on driver side cylnder head, a front bolt.
Attach to frame, on a-arm.
I have a set of the factory ones used for my 1967 Camaro.
My 1968 Firbird, did not have that strap. Later on found out about it.
Be glad you do not have poly engine mounts. BUT with your 455 mill, yeah not a bad desired choice either!

FAST RS

What i find strange is when i pulled out my stock 350 there was a factory style torqstrap it bolted from were the engine mount bolts to the bllock to the K member i belive its called.

Project: 85 2.8 bird

from the Classic Industries catalog (cd)

Polyurethane Trans. Mounts
Chemicals, excessive movement and overall time in
general can take its toll on one of the most crucial
components of your driveline. . . the transmission
mount! Once available only in deteriorative rubber
compound, these mounts are now available in a longer
lasting and very durable polyurethane material. For
those seeking a quality replacement transmission mount
on a modified or original Firebird, these mounts,
(available in 4 popular colors) will do the trick and add
a performance appearance when using the bright colors
available. Polyurethane mounts can last longer than
factory mounts and offer years of dependable service.
31108G 1967-97 black .................. 29.95 ea
31108B 1967-97 blue .................... 29.95 ea
31108R 1967-97 red ...................... 29.95 ea
31108Y 1967-97 yellow ................ 29.95 ea


and guess what they loo like? see my pic above.

oem rubber peices listing:

V8 Trans. Mounts
T82224 67-69 400 .............................. 9.95 ea
T82224 70-74 350 (w/o M40 AT) ..... 9.95 ea
T82268 70-74 350 (with M40 AT) .... 9.50 ea
T83094 75-76 350 .............................. 9.50 ea
T82224 70-74 455 (w/o M40 AT) ..... 9.95 ea
T82268 70-74 455 (with M40 AT) .... 9.50 ea
T82224 70-74 400 (w/o M40 AT) ..... 9.95 ea
T82268 70-74 400 (with M40 AT) .... 9.50 ea
T82224 75 455 .............................. 9.95 ea
T83188 75 350R engine ............... 19.95 ea
T83189 77-79 350L engine ................ 16.95 ea
T83094 75-76 400 .............................. 12.95 ea
T83188 81 267 (4.4L) ................... 19.95 ea
T83199 77 400 .............................. 22.95 ea
T83189 87 5.7L ............................ 16.95 ea
T83161 88-89 5.7L ............................ 29.95 ea
T83159 77-81 305 (5.0L) w/AC ........ 19.95 ea
T83189 77-81 305 (5.0L) w/o AC ..... 16.95 ea
T83189 82-87 5.0L (305) ................... 16.95 ea
T83161 88-89 5.0L (305) ................... 29.95 ea

FAST RS

I orderd them they were a compleatly different style then what i had taken off. I got a set through them and through jegs both sets i got were identical so i finaly ahd to settle with rubber. I called a guy who made solid mounts and he said that no one makes the ones i needed in poly.

FAST RS

Oh i was refering to the engine mounts in what i said not tranny mounts. I found the tranny mount with no problem.

Project: 85 2.8 bird

well hell,

Reproduction Motor Mounts
Reproduction motor mounts are totally dependable
and cost less than half what the original GM
mounts do. If originality isn't crucial, consider
TRW® replacements. Now available for 6 cylinder
or V8 applications.
TRW®
6 Cylinder Motor Mounts
T82284 1968-74 6 cylinder 250 (with one mount bolt) (2 piece mount) .............. 21.95 ea
T83099 1973-79 6 cylinder 250 (all) ............................... 17.25 ea
T83208 1982-89 6 cylinder 2.8L .......................................... 31.95 ea
V8 Motor Mounts
T82254 1967-69 V8 (400) RH or LH .......................... 24.50 ea
T83120 1970-74 V8 (350) LH ......................... 19.95 ea
T83121 1970-74 V8 (350) RH .......................... 19.95 ea
T83120 1970-74 V8 (400) LH ................... 19.95 ea
T83121 1970-74 V8 (400) RH ......................... 19.95 ea
T83120 1970-74 V8 (455) LH ...................... 19.95 ea
T83121 1970-74 V8 (455) RH .................... 19.95 ea
T83168 1975-76 V8 (350) RH or LH ................... 21.95 ea
T83168 1977 V8 (350R) RH or LH ...................... 21.95 ea
T83099 1977-79 V8 (350L) RH or LH ...................... 17.25 ea
T83168 1976-77 V8 (400) RH or LH ................... 15.25 ea
T83099 1981 V8 (267, 4.4L) RH or LH ........ 21.95 ea
T83168 1977-79 V8 (403) RH or LH ............ 15.25 ea
T83099 1977-89 V8 (305, 5.7L) RH or LH .............. 17.25 ea
T83099 1987-89 V8 (5.7L) RH or LH ........... 17.25 ea

FAST RS

I got mine fron anchor they were 20.00 a pop. Some slight modificatins had to be made so they would fit since i was doing a complete engine swap. too bad i could nt use my TH-350 tranny i took out and put it in my camaro after what i did friday night.

KED85

Fast RS has not offered enough information.

His challenge was placing a mid 70's Pontiac 455 into a First Gen Firebird.
It's a unique challenge to say the least.
PS Try doing the exhaust properly, using headers, and a rear streeing box.
Camaro is EASY in that challenge of larger mills & rear steering box.

"K" Member is Chrysler speak. But I understood.

FAST RS

Actualy got the exhaust done the headers fit like a glove. They did want to hit near the tranny so they ahd to be bent the rest of the exhaust went in flawless.

KED85

too bad i could nt use my TH-350 tranny i took out and put it in my camaro after what i did friday night.

WELL WHAT DiD YOU DO FRIDAY NIGHT
OR does your girlfriend now read the thread replys!

You put the Pontiac TH350 behind your 3.1 in the 1990 Camaro?

I'm still awaiting this one guy to give me his Chevy TH350 tranny!

THEGENERAL

oops didnt read the post completely thru sorry for the post anyway...LMAO

Goumba T

You made sure to put it back exactly the same, right? Otherwise you'll get some vibration.

FAST RS

No im pretty sure i screwed up my tranny friday night read my other thread. I was saying too bad it would not bolt up and take the place of my 700r4.

kevo2k6

of course! everything is great. its weird not hearin the clunk anymore. i like it tho.