Hi there.

I'm new to the forum, but have been reading some of the info about the 92-99 Boonies. I bought a 95 SE as a winter beater and love it!! I didn't want to drive my '89 LeSabre T-Type in the winter.

Anyway on to my question. My subframe mounts rotted away behind the front wheels.

I saw the Dorman replacement mounts with rubber bushings, but also saw that Poly bushings from an S-10 or a Fiero could work as well?

Any insight and experience shared would be appreciated.

Thanks!!

That could be tricky. If the holes in the subframe are rotted you will need to make patch plates to repair. I've done this om my '97 LeSabre using suburban poly bushings and lower washers and some off-the-shelf McMaster-carr parts. If the holes are not rotted I think what you listed are the two options left.

_________________
Blow all the things! Wait, I meant boost. Boost!


Runs:
'93 Pontiac Bonneville SSEi - Twincharged, manual, and lots more! Build thread
'97 Chevy Camaro - 3800 supercharged, T5, T-tops
'05 Cadillac STS - V8, AWD, her DD
'92 Olds Trofeo - Fair weather DD
'84 GMC Sierra Classic - Twin turbo 3800
'97 Buick LeSabre - L67 winter DD
'92 Pontiac Bonneville SSE future project

Doesn't run:
'87 Buick LeSabre T-type - future victim
'67 Buick LeSabre - future victim

Okay. I plan on checking the subframe over, and more importantly where the subframe bolts to on the body for rot. Better to find out now than throw money away on parts I can't use!

Some have tried fixes using oversized washers or plates but you have to weld them in place or the subframe shifts around.
If you do need to replace the subframe, try to find one from a warm state where they don't use road salts. It's those deicing chemicals that rot the subframes.
It will cost you for shipping but the subframe will be solid.

I got one from a yard in South Carolina shipped for around $250 total. It's in great shape.

_________________

WHITE WHINE - IT'S INTOXICATING. 1992 SSE Supercharged 236.26 ci (.040 Over)
15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Easy Performance Gen 3 Air/Fuel Calibrator, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers and 10" Subs, 1300 watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, McCoy Motorsports Ceramic Coated Ported Exhaust Manifolds, Fan Override, PowerSlot Slotted Rotors.
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim Trailblazer mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser

Thanks for the input, but sadly the body's rotten where the frame mounts. Anyone need a parts car?? Lol

Sorry to hear that.
The road "salts" are truly evil to metals.