Monster Transmission & Performance Reviews 

I bought one of these transmissions and three weeks later it's not working. And now iv spent all day Monday on the phone and never spoke to anyone they will not return any of my voice mail emails or the phone

Getting a timely refund on my core. Two months and still no core refund. They have a lame reason every time I call.

With the amount of money I spent you would think shipping would of been free,
Last time I buy from them

TRIED TO MAKE AN ACCOUNT TO WRITE A REVIEW ON A TUBO 400 I GOT FROM THEM LAST YEAR. FIRST ONE WAS SENT WITH DRY ROTTED REAR SEAL AND A CRACK IN THE TOP OF THE CASE. SENT BACK AND THIS ONE WON'T STOP LEAKING, REAR TAIL HOUSING, GOVERNOR COVER, AND PAN. WON'T BUY FROM THEM ANYMORE.

I have been looking at purchasing a replacement transmission for some time. I finally called in and found the experience quite informative. They answered all my questions and quickly got my transmission on its way to me.

I told them i was doing anold school v8 327 ci chevy swap in a s10 pickup, i wanted a 700r4 that would handle 450 horsepower or more, they charged me 3600 plus dollars. and when that project flopped i had an old 57 belair i decided would be better off with the 327 , n i was going to use an old school th350 tranny. So i sold the 700r4. Told him what i told monster transmission. He called they told him they sold me the lowest performance 700r4 for the 4.3 V6 with 180 horsepower, that if i had even drove the vehicle with that much horsepower
it would habe destroyed the transmission and i would not get any help.in warranty claims , yet they charged me for a higher performance stage 2 700r4 n semt me a pos. They lied their buts off. To me ,they ripped me off, and now i am.hearing they are doing this to a lot of people, i wont be buying any more stuff from.them. they are untrustworthy amd liars. Thieves

My sales rep Scott was awesome and got me taken care of very quickly. So far I am very pleased with the customer service they provide.

4l65e 2-4 band started slipping after only about 500 miles. Tore it apart myself and it appeared that a new band was used on a badly worn (concave friction surface). The band was worn on the edges but not in the middle which is evidence a new band was used on a badly worn drum. When I reported the issue to Monster I was told because I did not buy their torque converter my warranty was void and they wouldn't fix it.

Terrible company, I paid good money for a custom built torque converter, gave them my vehicle specs to make sure I got the right converter, and what I received was an off the shelf converter not built to my specs. They tell me I can pay to ship it back and they will reset the stall, but they won't even provide me the shipping info to send it back. They don't answer the phone and refuse to return calls after leaving several messages. Stay far away from this company.

Ordered Transmission, was told it would be fully dyno'd before shipped out. Plus will ship with case of transmission fluid. Had shipped to dodge dealership. Dealership installed transmission. Noted loud clunk when going into reverse. Ticking noise in reverse while backing up. Vehicle still moves forward when in park. Once in park unable to get out of park unless you go to rear of vehicle and push forward until you hear a click.
Called Monster Transmission (MT). Spoke to Haley, was transfered to technician. Tech said drive it 250 miles. Needs to work in.
Loud clunk noise gone. Everything else still an issue. Called Haley again, made me fill out a warranty form which I didn't understand since transmission is defective to begin with. Then was told I'd be on the hook for labor above 300.00. What! You sent me a defective transmission. Clearly wasn't tested before being shipped.
Since that call, it's going on 3 weeks. Monster Transmission is not calling me back. Monster Transmission hasn't called dealership where work was done. Monster Transmission is not answering my repeated emails.
Looks like this will go to court now. So. I cannot recommend this company and I urge you to do your research prior to doing business with Monster Transmission. Look at reviews from bbb. F rating. Check reviews from other sites. Best of luck.

Just purchased my first transmission from Monster Transmissions. I’ve heard a lot of good things about Monster. Collin Decker was a pleasure to work with today with my purchase. He went over all the options and scenarios and made my decision easy. He answered all my questions about my purchase and was very knowledgeable about my setup in my ‘74 Bronco.

Great service and great price with warranty answered all questions

I didn’t know which Tranny to purchase but after talking to Dorothy, she really helped me to decide which Tranny was best for me. She was very professional, understanding, and Knowledgeable Thanks Dorothy..!! So far the staff has been in contact with me from the start. If the Tranny holds up as well as the customer service I won’t shouldn’t have any issues at all. Thanks Monster keep up the Performance.!!!

I Urge you to go somewhere else ... They pay people to do good reviews .. they asked me to do a 5 star review for money off my transmission
I purchased a $3900 transmission with a 3 yr warranty. I received the transmission and on the very first test drive, 3rd gear was not working. I contacted them and they wanted me to pay an additional $800 for them to fix it. For 3 months I fought with them to fix it for free , but they told me that it was my fault and the warranty would not cover the shipping or bench time. I cut my losses and purchased another transmission from a local dealer

Monster Transmission is the absolute WORST company to ever order a transmission! I have been without a truck for 5 months and has to send me 3 transmissions for my truck! Customer Service is HORRIBLE they DO NOT get back in touch with you and DO NOT answer any questions or concerns you have.
NEVER,NEVER,NEVER WILL I ORDER FROM THEM AGAIN
DO NOT WAIST YOUR TIME WITH THESE PEOPLE

So far, no communication. After they take your money and sign your contract. Nothing Called the sales representative, Collin. Really has no way to help but gave me customer service number. Finally got a hold of them. They informed me of the actual shipping time frame. Called to follow up Last week Left message with customer service again and got a ticket number to refer to if they didn't call back. They didn't. Nothing. Then a trucking company calls my husband, not even sure how they got his number, and asks when they can deliver my transmission and do we have a forklift? No tracking Nothing! I'm very concerned about getting my core charge back of $1200. Haven't got the transmission yet. 6 to 8 weeks to ship. Not 4 like the sales rep indicated. Which is not a problem but honesty helps everyone plan. Sales reps must be on commission, they're very fast at getting the order and your first e mails out to seal the deal then relationship is over. The estimated ETA cust service gave me was correct. That's why I was calling to get a tracking number or something. I never got any shipping information. Ever. The mechanic just wanted a shipping number or info on when it would arrive to schedule. So I called and left message with customer service. Never heard back but got the call from the shipping dispatcher to schedule a delivery date.
I'm hoping the communication is better when I go to return my core and that there are no problems with the transmission. Communication is customer service. So can't say they have good customer service.

Do not use this service.
I saved a couple hundred bucks but it took over 4 months for them to get me the correct parts (which I had to pay extra for a torque converter return that THEY missold me).

When they say we build more than transmissions, they build relationships, this is incorrect. They should hire people who actually call you back. I feel like once they got my money they stopped giving a f*uck about me.

Honestly screw them.

Pending warranty vehicle been down 4 months.

Great customer service! Appreciate all the help placing our order for a transmission.

Ordered two transmissions from Monster: a 4wd and a 2wd. Both were for Chevy Tahoe's of the same gen (2000 5.3L and 2003 5.3L). Was sent the right transmission with the wrong bell housing on it for the 4WD and spent days waiting for a resolution to their mess up with no response even calling them every day I kept getting pushed off and told that "the techs hadn't looked at the pictures yet". I gave them everything the asked for all the information, pictures everything. They finally insisted that they had sent me the correct unit which it clearly was not. A tech rep FINALLY concurred with me that the bell housing was wrong and agreed to send me a new one (which I am currently awaiting). My brother's transmission (the other one) we installed and it has bad shift solenoids. Just an awful company, they do bad work and will put you off as long as possible if you don't get on their backs. DO NOT BUY FROM MONSTER IF YOU DON'T ENJOY WASTING TIME, MONEY AND PATIENCE.