Buick Terraza Transmission Problems & Cost

Introduced for the 2005 model year, the Buick Terraza was a luxury-themed minivan that didn’t sell particularly well in North America when it was new. But it offers outstanding value on the used market, given its luxurious amenities and V6 power. Both engines were mated to the 4-speed GM 4T65E transmission, which with routine maintenance can be fairly reliable. However, Buick Terraza transmission problems do still happen. So let’s find out what you can do.

Need a replacement transmission? Get an estimate for replacement transmissions and local installation. Look up your transmission model by vehicle make and model.

What Transmission Do I Have?

Buick Terraza Transmission Models

Buick Terraza: 4T65E FWD Transmission

Buick Terraza Transmission Replacement Cost Estimate

Pricing varies by model. To be 100% sure on pricing, have your VIN# handy and use our Get An Estimate feature to look up your transmission by VIN#.

Replacement 4T65E Transmission:

TransmissionStreet Smart TransmissionAutozoneAdvance Auto PartsDealer Retail
4T65E1811153015992275

What are the DTC codes related to Buick Terraza transmission problems?

Trouble CodeDescription
P0717Input/Turbine Speed Sensor Circuit No Signal
P0730Incorrect Gear Ratio
P0753Shift Solenoid 'A' Electrical
P0758Shift Solenoid 'B' Electrical
P1860TCC PWM Solenoid Circuit Electrical

Buick Terraza Transmission Recalls

None Found

Buick Terraza Technical Service Bulletins (TSB)

TSB 02-07-30-022B – Usually harsh shifts, along with multiple transmission diagnostic trouble codes – 4T40E Transmission | 4T45E Transmission | 4T65E Transmission

Problem – Drivers can experience unusually harsh shifts, along with the following DTC’s: P0716, P0717, P0730, P0753, P0758, P1860, P1887
Solution – Inspect, repair and/or replace the transaxle 20-way connector to the transmission wiring harness

TSB 00-06-04-037A – Harsh shifting with DTC’s P0716 and/or P0717 – 4T40E Transmission | 4T45E Transmission | 4T65E Transmission

Problem – Some drivers may experience unusually harsh gear changes, accompanied by a P0716 and/or P0717 DTC
Solution – This problem can be caused by an intermittent connection of the input speed sensor circuit at the transaxle 20-way connector

TSB 06-07-30-023 – 4T65E transmission 1-2 Shift Shudder

Problem – Shuddering or shaking may be felt during the 1-2 shift, under light acceleration at speeds below 25 mph.
Solution – To correct this common 4T65E transmission problem, the entire second clutch assembly will need to be replaced.

TSB 08-07-30-016 – Slipping, refusal to shift, overheating

Problem – Slipping between the gears, overheating, refusal to shift out of a gear, and/or DTC P0894 or P0218, may be because by friction material debonding from the torque convertor clutch (TCC).
Solution – If the friction material has circulated throughout the transmission, the entire transmission may need to be replaced. It is possible to remove the material from the internal components (like transmission cooler lines and the valve body), but it depends on the extent of the damage.

Common Problems with the Buick Terraza Transmission

TCC Solenoid Circuit DTC – Buick Terraza 4T65E

Problem – Diagnostic trouble codes (P0742, P2761, P2764) relating to the torque convertor clutch, may be caused by an incorrectly routed internal wiring harness that can short itself out over time.
Solution – To solve this problem, reposition the tan colored TCC solenoid so that it does not come in contact with the metal wiring harness retaining clip.

Lack of Response
Leaking Fluid
Low Fluid
Burning Smell
Grinding or Shaking
Whining, Clunking or Humming
Refuses to Go Into Gear
Torque Converter Issues
Valve Body Issues
Transmission Noisy in Neutral
Gears Slipping
No 3rd or 4th Gear
No 1st or 2nd Gear
No Reverse
Dragging Clutch
Trouble Codes / Check Engine Light

Can I drive with a transmission problem?

Once you’ve discovered that you have a transmission issue, continuing to drive your minivan can make the problem even worse. Many 4T65E transmission problems like slipping in and out of gear, or refusing to shift out of a gear, will get a lot worse if you continue to drive. And you may have to spend even more money to replace broken hard parts like a clutch drum. At which point it may be more cost effective to just buy a remanufactured 4T65E transmission.

How often does a Buick Terraza transmission need to be replaced?

With proper maintenance, a Buick Terraza 4T65E transmission can last between 130,000-180,000 miles. A properly built remanufactured 4T65E on the other hand, may last significantly longer if all of the factory design flaws are addressed.

How are Buick Terraza transmission issues diagnosed?

The first step to diagnosing a 4T65E transmission problem is to connect a code reader to the OBDII port under the dash. After all of the diagnostic trouble codes have been assessed, the mechanic can then perform a visual inspection, and possibly a test drive, to verify the problem.

How is a Buick Terraza transmission replaced?

Because the Buick Terraza was designed as a front wheel drive vehicle (even if it has all wheel drive), the motor may have to be partially removed in order to pull the old transmission out. Obviously, installing the new 4T65E is a reverse of the removal process. However, the ECU / PCM will need to be reprogrammed / reflashed to accept the new transmission.

Recommendations for Buick Terraza transmission issues?

To save time and get back on the road faster, have your 17-digit truck VIN# handy and you can get an online quote for a reman Buick Terraza transmission here, then find a local shop using our Find a Shop guide to install it for you.

How to Solve Buick Terraza Transmission Problems

Solution A: Buy a Used Buick Terraza Transmission

Most people might think that buying a used 4T65E transmission would be the cheapest way to get back on the road. However, there is no guarantee that a used transmission won’t have the same problems that you’re having right now. And speaking of guarantees, that junkyard warranty probably won’t cover all labor charges if something goes wrong and you have to replace that transmission again.

Solution B: Buy a Rebuilt Buick Terraza Transmission

If you decide to buy a rebuilt 4T65E transmission, keep in mind that most mechanics will simply use OE spec Buick Terraza transmission parts, which means that the factory design flaws will still be there. Plus, any warranty that they give you might be good at that shop. So if you have transmission problems while your out of town, that warranty won’t do you any good.

Solution C: Buy a Remanufactured Buick Terraza Transmission

If you’re looking for a long term solution to your Buick Terraza transmission problems, then a remanufactured 4T65E transmission may be your best bet. There are often upgraded to correct for factory design flaws, which will make them last a lot longer than a stock transmission. And a few of them will offer nationwide warranties too.

Need a replacement transmission? Get an estimate for replacement transmissions and local installation. Look up your transmission model by vehicle make and model.

What Transmission Do I Have?

What Problem Does Your Buick Terraza Have?

Let us know the year, mileage and problem you’re having as well as any trouble (OBD) codes you’ve found. If you’ve been given a quote or paid for a repair, we’d like to hear about that too!

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roger nunez
1 month ago

no shifting 1 gear and 2 gear

Gary Shaffer
1 month ago

2005 Buick Terraza 135K miles. I purchased new and did all maintenance. When cold and from a stop the transmission slips and slams into 1st gear. When warm the issue goes away.

Frederick Horton
7 months ago

I just bought a used 2006 Buick Terraza 3.50 V6 it just started shuddering when I press my gas pedal. Hoping it’s not the transmission.

CALVIN GREEN
9 months ago

2005 BUICK TERARRA

CALVIN GREEN
9 months ago

TAKES ABOUT 20 MIN BEFORE IT CHANGES IN 2ND OR 3RD GEAR THEN DRIVES GREAT

Mike Schelley
1 year ago

2007 Terraza slips and shifts hard into 1st from stop…

Mrs Murry
1 year ago

I bought my 2006 Buick Terrzaz brand new from Luther Brookdale dealership. I kept up the maintenance little to no repairs but brakes and rotors. Then one day the car wouldn’t drive in first gear. I am so disappointed I see an old van still driving and I took care of mine. I believe Buick own me a replacement Van. I sold it back to Luther Brookdale in Brooklyn Center Minnesota for $250.00 I feel cheated and broken. They need to give me a replacement Van free. I bought this car new Low mile and everything.

Bob Jones
2 years ago

06 terraza
240k mi. 2 fld and filter changes.
Hard shifts and major slippage between 2-3 & 3-4. Over heating after 1hr of +75mph

Bob Jones
2 years ago
Reply to  Bob Jones

This along with uncountable electric problems through out the van. Doors, radio, lights, trans sensors (says the Trac and stability control needs service right when you start it, then goes away 5-10 min later), rear air ride won’t deflate to level the van it is always completely full, rides like a lumber wagon. Lights dim every 7-9 seconds, new alternator and battery and cables. Sometimes it looks like they are flashing off and on.

Robert Malcom Harmon Jr
3 years ago

2005 buuck terazza cxl fwd. 160000 miles

Robert Malcom Harmon Jr
3 years ago

Lost overdrive and 3rd gear while pulling away from parked position , was no sound etc , I shifted down to second then to 3rd and then overdrive , but when stopped had to shift down to first 2nd 3rd overdrive again

Stacey Watkins
1 year ago

Did you ever find a solution for this? I’m experiencing the same issue now.

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