0012381077083

Chamberlain

Model 7708CB

Internet #100431682

Store SKU #293784

8 ft. Chain Drive Extension Kit

$30.77 /each
  • Fully open garage doors up to 8 ft. high
  • Quick-install rail system
  • Durable chain drive replacement belt

Frequently Bought Together

Product Overview

The Chamberlain 8 ft. Chain-Drive Extension Kit is compatible with Chamberlain chain drive garage door openers (Does not fit Chamberlain Model # HD220 Internet # 205215863 Store SKU # 1000053358t). It comes with a rail extension and replacement belt and can be used with garage doors up to 8 ft. high. Easy to install.

  • For use with garage doors up to 8 ft. high
  • Works with all Chamberlain chain-drive models
  • Kit includes rail extension and replacement chain
  • Comes ready to install with complete instructions
  • Note: Product may vary by store

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Customer Questions & Answers

16 Questions29 Answers

Customer Questions & Answers

8 ft. Chain Drive Extension Kit
8 ft. Chain Drive Extension Kit

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This question is from 8 ft. Chain Drive Extension Kit
 
5 answers

can this extension really be used with the Chamberlain model #995XD 1/2 HP system?

This question is from 8 ft. Chain Drive Extension Kit
Asked by
Dave
Spanish Fork UT
July 15, 2011
The extension rail looks radically different than what I have. I have not unpacked the instructions. but wanted your input first. Some time ago I was quoted to use extension kit # 7806CB. My local Home Depot does not carry that unit.
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Answers (5)

Asked by
Odessa, TX, USA
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July 2, 2013
Answer: 
the extension kit I purchased worked well with my opener.
4.652 out of 5 (207)
Premium 1/2 HP Chain Drive Garage Door Opener
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Asked by
Marco Island, FL, USA
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September 11, 2012
Answer: 
if your garage door opener is a screw drive design, built after june 2007, then yes this is the right part.
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Asked by
Hollywood, FL, USA
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February 13, 2012
Answer: 
you proply have an older kit that would look tike a "T" looking down the front of it
the new kits look like the boxed rail
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August 3, 2011
Answer: 
The Chamberlain 995XD is a screw drive and would need a screw drive extension kit. The 7806CB is a screw drive extension. They will work together
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Asked by
Atlanta, GA
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July 19, 2011
Answer: 
Greetings,
My name is Tom from Home Depot’s How to Community found at www.community.homedepot.com and thank you for your question. You are correct, the model number for the extension kit you need is 7806CB which is for a screw drive unit such as your model 995XD. The one pictured on the link you forwarded is model number 7808CB, and is for a chain drive as described. It will not work for your unit
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This question is from 8 ft. Chain Drive Extension Kit
 
3 answers

Does this work with the NEW HD220 1/2 HP Chain Dr?

This question is from 8 ft. Chain Drive Extension Kit
Asked by
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December 6, 2014
The HD220 is a new GD opener being stocked in stores. Does this extension work with it?
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Answers (3)

Asked by
CAPE CORAL , FL.
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October 23, 2015
Answer: 
IT SAYS IT WON'T IN ABOVE PARAGRAPH....DXD
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Asked by
Kannapolis, North Carolina
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March 3, 2015
Answer: 
Yes
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December 8, 2014
Answer: 
The HD220 will not work with the extension kit.
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This question is from 8 ft. Chain Drive Extension Kit
 
2 answers

will this fit the Sears 3/4 HP chain drive model # 54990 made by chamberlain???

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July 28, 2016
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Answers (2)

August 1, 2016
Answer: 
Hello Tabo - Yes, this extension rail will work with your Craftsman garage door opener.
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Asked by
Chicago
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August 1, 2016
Answer: 
Yes it will fit.
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This question is from 8 ft. Chain Drive Extension Kit
 
2 answers

Can I use the extension chain as a replacement for the chain/cable on the PD212D model?

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Asked by
New York, NY
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April 8, 2016
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Asked by
Chicago
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August 1, 2016
Answer: 
It would only work if you also use the extension rail that comes with the kit. It would then be an opener for an eight foot door. It would work on a 7 foot door but the motor would be located a foot farther to the back of the garage. It is an entire chain/cable replacement but for an 8 foot door. Call Chamberlain if you need to order a chain/cable for a 7 foot door.
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April 8, 2016
Answer: 
No, this kit just extends the listed models capabilities from 7' to 8', it is not an entire chain.
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Customer Reviews

Rated 4.5 out of 5 by 31 reviewers.
Rated 5.0 out of 5.0 by great purchase was easy to install,instructions were very easy to follow,would recommend August 16, 2016
Rated 5.0 out of 5.0 by Perfect part This is what needed to extend my garage door opener for an 8ft door. August 16, 2016
Rated 5.0 out of 5.0 by Get the right unit first! This unit does not work with all Chamberlain chain drive units. I first bought an incompatible unit and did not discover the problem until I was well along in the assembly. Back to HD, bought the right unit for like eight bucks more and finished the install in an hour or two. Thank goodness for HDs generous return policy. All the parts fit perfectly, the instructions are clear and simple, and when your done it works like a charm. Lifts my eight by ten foot insulated steel double wall door with windows easily. Nice. July 12, 2016
Rated 5.0 out of 5.0 by easy change over. For those who want to extend the travel of their 7 foot door opener to accommodate an 8 foot door and it's travel this is a very easy modification to do. Instructions were very clear and it the kit had everything needed to do the change over. March 24, 2016
Rated 5.0 out of 5.0 by 8 FT. CHAIN DRIVE EXTENSION KIT Simple addition to 7 foot tall garage door opener kit to accommodate an 8 foot tall door. December 15, 2015
Rated 1.0 out of 5.0 by good product-poor shipping the extension kit was complete, and connected very well with main door opener, worked good December 15, 2015
Rated 5.0 out of 5.0 by Chamberlain 8 foot garage door opener This unit replaced a Genie which was purchased 5 years ago and I had nothing but trouble with. Unit went up quickly since I was just replacing the unit and programmed even easier than the Genie it replaced. The cost was way cheaper than the Genie and was able to purchase a second unit for a little more than the original unit. I would highly recommend this unit. October 27, 2015
Rated 3.0 out of 5.0 by Not the correct extension All of the components were included with this extension kit but the chain was too long and the hole in the rail for the pulley was too big. I had to shorten the chain and make a bushing for the bolt to fit the larger hole. The box was labeled correctly but the parts seemed to be for a larger garage door. I made it work but it took a lot of time and effort. I have to install another one of these but I plan to check the parts before I start the installation this time and if they are not correct I will return it to the store. September 1, 2015
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