[Defender110]

Has anybody installed a Group 31 battery in their Gen 4? The battery box fit on the stock Group 94R looks pretty tight. Heard of some folks putting these in older generations. I'm looking to install an Odyssey Extreme series battery, which I've had excellent luck with in other trucks.

 

[josiahg52]

Physically they should fit but I doubt you'll get them connected. Does Odyssey make a group 31R?

 

[Highway 4x4]

As I recall the passenger side is a little tighter than the driver side for a larger battery. I have the Odyssey 94R H7 L4 batteries. That should do it.

 

[Defender110]

I'm thinking that Group 27 batteries may be the way to go. They should fit and Odyssey makes the Extreme series in the 27.