Name: Chamberlain 8808CB-P 8 ft. Garage Door Belt Drive Rail Extension Kit, Black
Brand: Chamberlain
SKU: 1APEUIBXSQG8
Price: 186.17 CAD
Availability: InStock
Rating: 2.7 (22 reviews)

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Chamberlain 8808CB-P 8 ft. Garage Door Belt Drive Rail Extension Kit&#44; Black

For use with Whisper Drive or Whisper Drive Plus belt  drive garage door openers||Works with garage doors up to 8'||Rail extension||Replacement belt

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<b>Features</b>. Designed specifically for use with chamberlain whisper drive and whisper drive plus belt drive garage door openers. Quick install rail system. Includes rail extension, replacement belt, and all necessary hardware. Works on garage doors up to 8 feet high<b>Specifications</b>. <b>Color&#58;</b> Black. <b>Material&#58;</b> Steel. <b>Country of Origin&#58;</b> Mexico. <b>Size&#58;</b> 8 ft&#46;- SKU: JNSN93618

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This kit contains the parts needed to modify a standard Chamberlain Whisperdrive garage door opener in order to accommodate doors taller than seven feet. While it is ridiculous to have to pay an additional 20% of the cost of the entire opener just to get an extension rod and a longer belt, this appears to be standard practice in the industry and the Walmart price is cheaper than any of the others I could find. The kit is easy to incorporate into the installation and everything worked as it should.

Parts Needed for Large Garage Doors

walmart.com

perfect condition, if you replace your current door opener make sure to check the height.  if your door is taller than 7 feet, you will need this

plan ahead

I have two garage doors and had a friend replace the 10 foot opener.  Then the opener broke on the 8 foot door I called him and he told me the best opener to get to replace it.  Of course since he replaces them for a living it did not occur to him to tell me about the 8 FT vs the 7 FT doors.  I bought the  Chamberlain model 970 and preceded to remove the old one.  Once removed I started installing the new opener only to find that it was to short and I needed an extension for the 8 Ft door.  Needless to say I was mad.  After talking to my friend again he said he has not installed 7 FT garage doored for 10 years and it never occurred to him that the opener would only be 7 FT.  I also did read the reviews on the websites until after the fact and found this has been a problem for some time.  Since I already have the 7 FT assembled I am not going to repack it and take it back so I bought the extension and installed it.  I love the opener and the features but there should be clearing instruction to check the door height first before buying an opener and just maybe have a packed 8 FT door opener for sell at the store instead of a 7 FT.  I fell a little cheated.

Great opener but a little deceiving

chamberlain.com

I did not realize until I had the opener completely installed that I needed an extension kit for an 8 ft. door. The opener packaging and instructions could have been more clear that it was for a 7 ft. door.  It took significant time to remove the newly installed opener and to re hang brackets.  Otherwise, the garage door opener and extension kit both work well.

7 ft. vs. 8 ft. Door

You spend a bunch of time selecting an opener with all the desired features, benefits, and pricing.  You then discover that an extension kit is required for an 8' door (like who even has a 7 foot door anymore?).  By then they have you, and you'll pay the unreasonable price for this 2 piece kit.  I was actually impressed with the low cost of the opener....but this extension bit is little slimy if you ask me.  Ditto on the exorbitant pricing for extra remotes. 
 Why not just add $40 to opener price instead of over charging us for the accessories and leaving us with a bad taste....when we otherwise would have had a good one?  I had a bunch of slack in the belt after assembly, which you can take out with the spring adjustment on the shuttle.

Unreasonably Expensive

I did a lot of reviews and read the feature descriptions of several models from Chamberlain and never once saw that this product would be too short for an 8-ft door. Didn't discover this unfortunate mistake until I had it assembled and ready to install on the ceiling. I drove through my neighborhood and out of dozens of homes did not see one house with a 7-ft garage door. Talked to an installer and he said he hasn't seen a 7-ft door in last 10 to 15 years as an installer. Didn't even know they made 7-ft doors with trucks as big as they are and have been for years. To say the least I was very disappointed in this oversight by Chamberlain. I almost disassembly the unit and took it back. I would have but my son and installed it and the door opens far enough to get my truck in the garage. The door hangs down about 5-inches or so. I feel Chamberlain should provide the extension kit free of charge for those of us with 8-ft doors. This would enlighten them to see that most everyone has a 8-ft door. I'm sure they won't because for people like me that discover this deficiency too late will most likely be forced to shell out $50.00 to $70.00 more for the kit that should have been included in the first place. I would recommend this product to a friend however, I will inform them of this deficiency. The features and quiet operation of the unit are all a plus. This is why I rated this product as 3 stars. Had this model worked for an 8-ft door I may have given 5-starts for now and completed a follow up sometime later.

Need 8-ft door extension

Great product.  
The fact it says no where (except every single other review) that you need an extension for more than a 7' door is poor.  Add to that you can't find the extension kit anywhere. Makes for a very poor customer experience. After doing a ton of research and buying your product, I am now buying an additional $70 item and waiting around for it to ship in 2 weeks without a working garage door.  Bad information.  Chamberlain should address this.

Great opener - poor needing extension

Do they even build houses with 7 ft garage doors? This garage door opener is nearly $400, top of the line.  And nowhere on it did it tell me to see if I need an extension before I have the whole thing installed. Now. I not only do I have to take it down to install an extension, I have to splice on extra wires for added length. Your manufacturing engineering team needs a serious talking to for overlooking this kind of thing year after year. Especially with so many comments on this page about exactly this problem. Is it a price point deal? In this range, I can't imagine it. I think you guys are just a little too comfortable in your market. It's embarrassing.

Mfg Eng not receiving feedback?

I have owned several houses over decades and never had a 7' door. I was surprised that what I bought was insufficient. Now I have to pay more, wait for the delivery, go without an opener until it arrives, and be irritated just because they didn't make it clear on the box. It is in small print on the bottom of the side near the warnings about potential lead exposure as required by CA.

Warning: You probably need to spend more

Nowhere on the outside of the box of the garage door opener did it say I was buying a garage door opener that would only fit a 7 foot door. Why not manufacturer one garage door opener that will fit both 7 and 8 foot doors? I wouldn't have to go back to the store and pay $53 more for an extension kit that gives me a slightly longer belt and throw away a perfectly good belt. My house is 24 years old and both garage doors are 8 foot. Long overdue for a common sense change. 
At the least, add information on the outside of the garage door opener box stating what size door it will work with and the extension kit will be needed for taller doors!!!

Why throw away a perfectly good belt for a 7' door

Chamberlain 8808CB-P 8 ft. Garage Door Belt Drive Rail Extension Kit&#44; Black

Shop Confidently

Chamberlain 8808CB-P 8 ft. Garage Door Belt Drive Rail Extension Kit, Black